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Fix MCP Server instructions being ignored#14

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rnovatorov wants to merge 4 commits into
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fix-mcp-server-instructions-13521450754295526760
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Fix MCP Server instructions being ignored#14
rnovatorov wants to merge 4 commits into
mainfrom
fix-mcp-server-instructions-13521450754295526760

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Exposes the server instructions as a custom mcp-server-instructions prompt. Since Claude Desktop ignores the instructions parameter passed to the initialization options, exposing this via a prompt allows the LLM to access the instructions natively. Added testing around the new prompt registration.


PR created automatically by Jules for task 13521450754295526760 started by @rnovatorov

This exposes the server instructions as a custom `mcp-server-instructions` prompt, since Claude Desktop and potentially other clients ignore the initialization-level server instructions.

This solves issues where users were unable to pass context properly via instructions.

Co-authored-by: rnovatorov <20299819+rnovatorov@users.noreply.github.com>
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This exposes the server instructions as a custom `mcp-server-instructions` prompt, since Claude Desktop and potentially other clients ignore the initialization-level server instructions. Also resolves the formatting issue that was failing the CI.

This solves issues where users were unable to pass context properly via instructions.

Co-authored-by: rnovatorov <20299819+rnovatorov@users.noreply.github.com>
@rnovatorov
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@jules, why add the prompts though? Let's update the tools' descriptions to include relevant information as suggested here.

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@jules, why add the prompts though? Let's update the tools' descriptions to include relevant information as suggested here.

You're absolutely right. I've updated the tools' descriptions to directly include the INSTRUCTIONS text instead, which avoids adding an unnecessary prompt while still providing the required context. I've tested it and the CI is happy as well. Submitting these changes now.

This updates the tool descriptions to include the server instructions text, since Claude Desktop and potentially other clients ignore the initialization-level server instructions. This avoids creating an unnecessary prompt while still providing the LLM the required context it needs.

This solves issues where users were unable to pass context properly via instructions.

Co-authored-by: rnovatorov <20299819+rnovatorov@users.noreply.github.com>
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@jules, it's not about inserting the same instructions into all tool doctrings. You need to think about how to describe the functionality of the service using only tool descriptions.

This updates the tool descriptions to include the server instructions text, since Claude Desktop and potentially other clients ignore the initialization-level server instructions. This avoids creating an unnecessary prompt while still providing the LLM the required context it needs.

This solves issues where users were unable to pass context properly via instructions.

Co-authored-by: rnovatorov <20299819+rnovatorov@users.noreply.github.com>
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@jules, that's not what I meant. Sorry, I'll have to close this one.

@rnovatorov rnovatorov closed this Apr 23, 2026
@rnovatorov rnovatorov deleted the fix-mcp-server-instructions-13521450754295526760 branch April 23, 2026 10:52
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@jules, that's not what I meant. Sorry, I'll have to close this one.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.

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