CTFtime MCP Server

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions the tool returns matching events sorted by relevance, which adds some context, but lacks details on permissions, rate limits, error handling, or what constitutes 'relevance'. For a search tool with zero annotation coverage, this is insufficient.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is well-structured and front-loaded with a clear purpose statement, followed by organized sections for Args and Returns. Every sentence adds value without redundancy, making it efficient and easy to parse.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given 4 parameters with 0% schema coverage and no annotations, the description provides basic parameter info and mentions sorted relevance in returns, but an output schema exists, so return values needn't be detailed. However, for a search tool with siblings, more guidance on usage and behavioral traits would improve completeness.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It lists all parameters with brief explanations (e.g., 'Search keywords' for query, defaults for limit and booleans), which adds meaning beyond the bare schema. However, it doesn't elaborate on parameter interactions or constraints, such as how the booleans affect results, leaving gaps.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool searches for CTF events by specific criteria (name, description, or organizer), which is a specific verb+resource combination. However, it doesn't explicitly differentiate from sibling tools like 'get_past_ctfs' or 'get_upcoming_ctfs' that might also retrieve events, though the search functionality is implied to be broader.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit guidance is provided on when to use this tool versus alternatives like 'get_past_ctfs' or 'get_upcoming_ctfs'. The description only states what the tool does, not when it's preferable over other tools, leaving the agent to infer usage context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.