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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, so the safety profile is fully covered. The description adds a useful note that the payload includes tasks, timeline, and status, but says nothing about error behavior for an invalid/unknown missionId or about response size.

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 the payload contents listed immediately, followed by a documentation link. No filler, though the bare URL adds little routing value for an agent.

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 simple read-only single-parameter tool, the description covers what the tool returns, which partly compensates for the absent output schema. Missing only edge-case behavior (invalid ID, permissions), which is minor at this complexity.

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?

Only one parameter exists and the schema documents it fully at 100% coverage ('Mission ID to get details for'). The description adds no format, prefix, or lookup guidance beyond what the schema already provides, so the baseline of 3 applies.

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 ('Get') and resource ('detailed information about a specific mission') and enumerates the content returned (tasks, timeline, current status). This distinguishes it from listUserMissionsTool and getMissionStatsTool, though it never explicitly names those siblings as alternatives.

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 or comparison against the many mission-related siblings (findMissionTool, getMissionStatsTool, getMemberMissionsTool, listUserMissionsTool). 'A specific mission' weakly implies you must already hold a mission ID, but the agent must infer this.

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