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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds only the visibility qualifier 'public', which usefully implies no auth for public records. It says nothing about what happens for private or nonexistent missions, which is the main remaining behavioral gap.

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?

A single front-loaded sentence with no filler. Subject, action, scope and lookup key all appear in one pass.

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?

There is no output schema, so the description is the only source of shape information, and it says nothing about the returned mission object or error cases. For a one-parameter read tool with full annotation coverage, the omissions are tolerable but leave the agent guessing about the return payload.

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 carries the parameter burden, and all it offers is 'numeric id'. That is actively at odds with the schema, which types id as a string (minLength 1, maxLength 64). An agent could take 'numeric' literally and pass a number instead of a string.

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?

States a specific verb and resource ('Fetch one ... mission') plus the scope ('public', 'by numeric id'), which implicitly separates it from list_missions. The 'one' vs the sibling list tool is clear enough that an agent can route correctly. Minor ding for 'numeric id', which is not how the schema types the parameter.

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?

There is no explicit when-to-use guidance and no named alternative. The agent must infer that this is the detail-lookup path versus list_missions or get_submission_status/claim_mission from the word 'one' and the singular 'mission' alone.

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