<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Undertow market liquidity and exit-cost tools · undertow-mcp · changes | VerifyMCP</title><description>Recorded changes to this MCP component: tools, parameters, capabilities, advisories and trust-score checks. Security-relevant changes by default; append ?materiality=all for everything.</description><link>https://verifymcp.io</link><atom:link href="https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp.xml" rel="self" type="application/rss+xml"/><item><title>[SECURITY] undertow-mcp: The server rewrote its instructions, which are the text every model session reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a0848b-313e-7cf4-bd97-03af829a6363</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a0848b-313e-7cf4-bd97-03af829a6363</guid><description>The server rewrote its instructions, which are the text every model session reads. Compared against 2026-09-08.</description><pubDate>Wed, 09 Sep 2026 05:01:49 GMT</pubDate><category>security</category><category>neutral</category><category>server.instructions_changed</category></item><item><title>[SECURITY] undertow-mcp: Judged manipulation (unverified → pass)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a06ad3-5a8c-7e00-8620-7e145ef073e3</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a06ad3-5a8c-7e00-8620-7e145ef073e3</guid><description>Judged manipulation (unverified → pass). Compared against 2026-09-03.</description><pubDate>Fri, 04 Sep 2026 05:10:31 GMT</pubDate><category>security</category><category>improvement</category><category>check.reverified</category></item><item><title>[SECURITY] undertow-mcp: Judged manipulation (pass → unverified)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a065ac-d233-7275-aaf8-d3d3dd09796c</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a065ac-d233-7275-aaf8-d3d3dd09796c</guid><description>Judged manipulation (pass → unverified). Compared against 2026-09-02.</description><pubDate>Thu, 03 Sep 2026 05:10:19 GMT</pubDate><category>security</category><category>regression</category><category>check.unverifiable</category></item><item><title>[SECURITY] undertow-mcp: The server rewrote its instructions, which are the text every model session reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a065ac-d235-72d6-947a-20c225427765</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a065ac-d235-72d6-947a-20c225427765</guid><description>The server rewrote its instructions, which are the text every model session reads. Compared against 2026-09-02.</description><pubDate>Thu, 03 Sep 2026 05:10:19 GMT</pubDate><category>security</category><category>neutral</category><category>server.instructions_changed</category></item><item><title>[SECURITY] undertow-mcp: Stability (0.97 → pass)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a04bed-69f5-760d-bab5-254ff34d9f5f</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a04bed-69f5-760d-bab5-254ff34d9f5f</guid><description>Stability (0.97 → pass). Compared against 2026-08-28.</description><pubDate>Sat, 29 Aug 2026 05:10:45 GMT</pubDate><category>security</category><category>neutral</category><category>check.verdict</category></item><item><title>[SECURITY] undertow-mcp: Stability (0.97 → pass)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a041a0-9b34-7779-a075-54629299a50e</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a041a0-9b34-7779-a075-54629299a50e</guid><description>Stability (0.97 → pass). Compared against 2026-08-26.</description><pubDate>Thu, 27 Aug 2026 05:10:39 GMT</pubDate><category>security</category><category>neutral</category><category>check.verdict</category></item><item><title>[SECURITY] undertow-mcp: The server rewrote its instructions, which are the text every model session reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a02d07-00ec-7dec-af63-dcba132e92f2</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a02d07-00ec-7dec-af63-dcba132e92f2</guid><description>The server rewrote its instructions, which are the text every model session reads. Compared against 2026-08-22.</description><pubDate>Sun, 23 Aug 2026 05:10:28 GMT</pubDate><category>security</category><category>neutral</category><category>server.instructions_changed</category></item><item><title>[SECURITY] undertow-mcp: The server rewrote its instructions, which are the text every model session reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a007a7-76d3-7651-8162-55bc5db08e83</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_01a007a7-76d3-7651-8162-55bc5db08e83</guid><description>The server rewrote its instructions, which are the text every model session reads. Compared against 2026-08-15.</description><pubDate>Sat, 15 Aug 2026 23:00:10 GMT</pubDate><category>security</category><category>neutral</category><category>server.instructions_changed</category></item><item><title>[SECURITY] undertow-mcp: The server rewrote its instructions, which are the text every model session reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fd051-ca91-7861-93b0-90fa53cdb4f2</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fd051-ca91-7861-93b0-90fa53cdb4f2</guid><description>The server rewrote its instructions, which are the text every model session reads. Compared against 2026-08-04.</description><pubDate>Wed, 05 Aug 2026 05:07:28 GMT</pubDate><category>security</category><category>neutral</category><category>server.instructions_changed</category></item><item><title>[SECURITY] undertow-mcp: Tool “unwind_watch” rewrote its description, which is the text the model reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fcb29-774c-770c-a8f8-caaf15bfa3c9</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fcb29-774c-770c-a8f8-caaf15bfa3c9</guid><description>Tool “unwind_watch” rewrote its description, which is the text the model reads. Compared against 2026-08-03.</description><pubDate>Tue, 04 Aug 2026 05:05:20 GMT</pubDate><category>security</category><category>neutral</category><category>tool.description_changed</category></item><item><title>[SECURITY] undertow-mcp: Tool “depth_episodes” rewrote its description, which is the text the model reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d806-764e-b831-54f502f5cb1f</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d806-764e-b831-54f502f5cb1f</guid><description>Tool “depth_episodes” rewrote its description, which is the text the model reads. Compared against 2026-08-02.</description><pubDate>Mon, 03 Aug 2026 05:09:25 GMT</pubDate><category>security</category><category>neutral</category><category>tool.description_changed</category></item><item><title>[SECURITY] undertow-mcp: Tool “liquidity_tiers” rewrote its description, which is the text the model reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d806-7af3-9535-7cd174f7acf8</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d806-7af3-9535-7cd174f7acf8</guid><description>Tool “liquidity_tiers” rewrote its description, which is the text the model reads. Compared against 2026-08-02.</description><pubDate>Mon, 03 Aug 2026 05:09:25 GMT</pubDate><category>security</category><category>neutral</category><category>tool.description_changed</category></item><item><title>[SECURITY] undertow-mcp: Tool “unwind_watch” rewrote its description, which is the text the model reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d808-7270-90b0-66e3cc4767f4</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d808-7270-90b0-66e3cc4767f4</guid><description>Tool “unwind_watch” rewrote its description, which is the text the model reads. Compared against 2026-08-02.</description><pubDate>Mon, 03 Aug 2026 05:09:25 GMT</pubDate><category>security</category><category>neutral</category><category>tool.description_changed</category></item><item><title>[SECURITY] undertow-mcp: Tool “venue_concentration” rewrote its description, which is the text the model reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d809-73d8-8044-fa47d60541e1</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d809-73d8-8044-fa47d60541e1</guid><description>Tool “venue_concentration” rewrote its description, which is the text the model reads. Compared against 2026-08-02.</description><pubDate>Mon, 03 Aug 2026 05:09:25 GMT</pubDate><category>security</category><category>neutral</category><category>tool.description_changed</category></item><item><title>[SECURITY] undertow-mcp: The server rewrote its instructions, which are the text every model session reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d809-7d1f-b9b8-e333fa2798be</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fc606-d809-7d1f-b9b8-e333fa2798be</guid><description>The server rewrote its instructions, which are the text every model session reads. Compared against 2026-08-02.</description><pubDate>Mon, 03 Aug 2026 05:09:25 GMT</pubDate><category>security</category><category>neutral</category><category>server.instructions_changed</category></item><item><title>[SECURITY] undertow-mcp: Transport (fail → pass)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3200-797a-bbca-d57dcd676a83</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3200-797a-bbca-d57dcd676a83</guid><description>Transport (fail → pass). Compared against 2026-07-29.</description><pubDate>Thu, 30 Jul 2026 08:54:11 GMT</pubDate><category>security</category><category>improvement</category><category>check.verdict</category></item><item><title>[SECURITY] undertow-mcp: Authorization (Authorisation not fully verified: no authorisation is required to call this server, and 7 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3201-706f-b727-693d26316b57</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3201-706f-b727-693d26316b57</guid><description>Authorization (Authorisation not fully verified: no authorisation is required to call this server, and 7 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.). Compared against 2026-07-29.</description><pubDate>Thu, 30 Jul 2026 08:54:11 GMT</pubDate><category>security</category><category>neutral</category><category>check.reason</category></item><item><title>[SECURITY] undertow-mcp: The server rewrote its instructions, which are the text every model session reads</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3204-7619-b414-1b3778aaa714</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fb23b-3204-7619-b414-1b3778aaa714</guid><description>The server rewrote its instructions, which are the text every model session reads. Compared against 2026-07-28.</description><pubDate>Thu, 30 Jul 2026 08:54:11 GMT</pubDate><category>security</category><category>neutral</category><category>server.instructions_changed</category></item><item><title>[SECURITY] undertow-mcp: Transport (pass → fail)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0b-7e3f-b243-dd088d2cf4b8</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0b-7e3f-b243-dd088d2cf4b8</guid><description>Transport (pass → fail). Compared against 2026-07-28.</description><pubDate>Wed, 29 Jul 2026 13:33:46 GMT</pubDate><category>security</category><category>regression</category><category>check.verdict</category></item><item><title>[SECURITY] undertow-mcp: Authorization (Authorisation not fully verified: no authorisation is required to connect, but we couldn&apos;t read the tool list to see what that exposes.)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0c-7461-b2b8-25df59c67593</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0c-7461-b2b8-25df59c67593</guid><description>Authorization (Authorisation not fully verified: no authorisation is required to connect, but we couldn&apos;t read the tool list to see what that exposes.). Compared against 2026-07-28.</description><pubDate>Wed, 29 Jul 2026 13:33:46 GMT</pubDate><category>security</category><category>neutral</category><category>check.reason</category></item><item><title>[SECURITY] undertow-mcp: Endpoint reachability (reachable → not serving MCP)</title><link>https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0d-7ae6-84c9-9132a443ce08</link><guid isPermaLink="true">https://verifymcp.io/servers/beepboop2025-undertow/undertow-mcp#chg-chg_019fae14-ce0d-7ae6-84c9-9132a443ce08</guid><description>Endpoint reachability (reachable → not serving MCP). Compared against 2026-07-28.</description><pubDate>Wed, 29 Jul 2026 13:33:46 GMT</pubDate><category>security</category><category>regression</category><category>capture.status_changed</category></item></channel></rss>