# MCP server asana\_search\_tasks incompatible with Claude models

**URL:** <https://forum.asana.com/t/mcp-server-asana-search-tasks-incompatible-with-claude-models/1065894>\
**Category:** API & Developers\
**Created:** [28 May 2025 05:15 UTC](https://forum.asana.com/t/mcp-server-asana-search-tasks-incompatible-with-claude-models/1065894 "2025-05-28T05:15:04Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Nathan\_Adler](https://luna1.co/8d76cd.png) [@Nathan\_Adler](https://forum.asana.com/u/Nathan_Adler)\
**Post date:** [28 May 2025 05:15 UTC](https://forum.asana.com/t/mcp-server-asana-search-tasks-incompatible-with-claude-models/1065894/1 "2025-05-28T05:15:04Z")

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Hi there,

I’ve tested with Claude code and VScode copilot with Claude sonnet 4, and found that Claude errors with Asana’s MCP server specifically with the inclusion of the model `asana_search_tasks`. Co-pilot with gpt-4o doesn’t run into this error.

The error is  
API Error: 400 {“type”:“error”,“error”:{“type”:“invalid\_request\_error”,“message”:“tools.105.custom.input\_schema.properties: Property keys should match pattern ‘\[1\]{1,64}$’”}}

I’d love if someone at Asana could investigate this as a priority to ensure their MCP server serves tools that are compatible with Claude’s tool spec!

Cheers

* * *

1. a-zA-Z0-9\_-

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**Author:** ![ham](https://sea2.discourse-cdn.com/asana/user_avatar/forum.asana.com/ham/32/40708_2.png) [@ham](https://forum.asana.com/u/ham)\
**Post date:** [14 August 2025 11:40 UTC](https://forum.asana.com/t/mcp-server-asana-search-tasks-incompatible-with-claude-models/1065894/2 "2025-08-14T11:40:20Z")

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and no answer from Asana as usual

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**Author:** ![Phil\_Seeman](https://sea2.discourse-cdn.com/asana/user_avatar/forum.asana.com/phil_seeman/32/81525_2.png) [@Phil\_Seeman](https://forum.asana.com/u/Phil_Seeman)\
**Post date:** [14 August 2025 13:34 UTC](https://forum.asana.com/t/mcp-server-asana-search-tasks-incompatible-with-claude-models/1065894/3 "2025-08-14T13:34:53Z")

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cc: @John_Baldo @Mikhail_Melikhov

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**Author:** ![Bill\_Hewitt](https://sea2.discourse-cdn.com/asana/user_avatar/forum.asana.com/bill_hewitt/32/109720_2.png) [@Bill\_Hewitt](https://forum.asana.com/u/Bill_Hewitt)\
**Post date:** [14 August 2025 23:52 UTC](https://forum.asana.com/t/mcp-server-asana-search-tasks-incompatible-with-claude-models/1065894/4 "2025-08-14T23:52:32Z")

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Hi folks,

Please let us know if you’re still seeing this issue, I believe a fix addressing it went live about 3 weeks ago.

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**Author:** ![system](https://sea2.discourse-cdn.com/asana/user_avatar/forum.asana.com/system/32/276370_2.png) [@system](https://forum.asana.com/u/system)\
**Post date:** [21 August 2025 23:53 UTC](https://forum.asana.com/t/mcp-server-asana-search-tasks-incompatible-with-claude-models/1065894/5 "2025-08-21T23:53:28Z")

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