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

Annotations already cover the safety profile (readOnly, idempotent, closed-world), so the description's job is to add context — and it does, by enumerating the returned facts (developer, community, status, handover, pricing, payment plan, highlights, considerations, sources), effectively standing in for the absent output schema. It stops short of noting failure behavior for a bad slug or how cited sources are structured.

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?

One sentence, front-loaded with the verb and scope, then a tight field list. No filler or redundant restatement of the title; every clause carries information.

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?

For a single-parameter read tool with no output schema, the description supplies exactly the missing piece — the shape of the payload returned. The remaining gap is behavioral edge cases (no match, ambiguous name, source citation format), which keeps it from being fully complete.

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 coverage is 100% and the parameter description already says "Project slug (from search_projects) or exact project name." The description restates "by slug or exact name" without adding matching rules, case sensitivity, or fallback behavior, so it does not exceed the schema baseline.

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?

"Full facts for one project by slug or exact name" gives a clear resource and scope (single project, full detail), which implicitly contrasts with the list-oriented search_projects. It never names a sibling or states the contrast explicitly, so an agent must infer the retrieval-vs-search split.

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?

Usage is only implied: fetch one project's details when you already have its slug or exact name. There is no explicit when-to-use vs search_projects, compare_projects, or get_community, and no guidance on what to do if the exact name is ambiguous or unmatched.

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