Query must include 'is:issue' or 'is:pull-request' on `search_issues`

[raffaeler]

Describe the bug

Every time the search_issues in invoked I get this "error" (Query must include 'is:issue' or 'is:pull-request').
Anyway, the request goes on and the answer contains the results.

ModelContextProtocol.Client.McpClient[145193555]
      stdio-docker request failed for method 'tools/call': failed to search issues: GET https://api.github.com/search/issues?order=desc&page=1&per_page=1&q=AssemblyLoadContext+repo%3Adotnet%2Fruntime&sort=comments: 422 Query must include 'is:issue' or 'is:pull-request' [] (-32603).

A clear and concise description of what the bug is.

Affected version

{"name":"github-mcp-server","version":"v0.4.0"}' capabilities: '{"logging":{},"resources":{"subscribe":true,"listChanged":true},"tools":{"listChanged":true}}'

Steps to reproduce the behavior

I can see the error just because I log all the traffic, otherwise standard MCP clients normally don't bother about errors that are not blocking.
The query is "AssemblyLoadContext" on the dotnet/runtime repository.
While the repo may be not the best value passed to the mcp server (it's the LLM creating it), the error does not depend on it.

Expected vs actual behavior

The error should not occur even if it is not blocking.

[SamMorrowDrums]

I am actually planning on splitting the tool in two, and doing it as separate tools.

I have an open PR for doing it for search users to split orgs and users. I'm not 100% about merging it, but the same PR to split issues and PRs search and put them into the appropriate toolsets would definitely get merged.

We need that in feel.

[tonytrg]

see #334