This server has 2 tools with minimal but present documentation. Both tools have descriptions (>20 chars) and input schemas with typed parameters. However, the schemas are incomplete: parameters lack individual descriptions, making it difficult for LLMs to understand what each parameter controls. The tool names follow verb-noun convention (get_*), which is good. No output schemas are documented, and error handling guidance is absent. The server relies on the FastMCP framework but does not demonstrate adoption of current MCP patterns like tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite the file `tool_annotations.py` existing in the codebase, this suggests annotations may be defined but are not being applied to the actual tools in `activity.py`. Overall, the definitions are skeletal and would benefit from richer parameter documentation and explicit output schema documentation.

• Add parameter descriptions to both tools. For each of username, org, repo, since, until, max_results, add a 1-2 sentence description explaining what it controls, acceptable format, and constraints. Example: 'org: Optional organization name to filter activities. If omitted, returns all user activities across all organizations (string, max 39 chars).'
• Document output schemas for both tools. Specify: what fields are returned, their types, what they represent, and whether they can be chained to other tools. Example: 'Returns an array of activity objects with fields: id (string), type (string: PullRequestEvent|IssueCommentEvent|...), repo_name (string), timestamp (ISO 8601 date string), and author (string).'
• Apply tool annotations if the risk model warrants them. Both tools are READ_ONLY, so wrap them with readOnlyHint: true in their registration. If tool_annotations.py decorators exist, use them.
• Add error handling guidance to tool descriptions. Example: 'Errors: GitHub API rate limits (429), retry after 60 seconds. User not found (404), verify the GitHub username is correct. Invalid date format, use ISO 8601 (YYYY-MM-DD).'
• Add pagination info to descriptions. If get_user_activities can return hundreds of results, clarify the default limit, max_results behavior, and how to iterate pages. Example: 'Results are limited to max_results (default 50, max 100). Use the cursor in the response to fetch the next page.'
• Specify the GitHub API version and authentication requirements. Clarify which GraphQL queries are used and whether the tool requires a GitHub Personal Access Token with specific scopes (e.g., 'repo', 'read:user').