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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered structurally. The description adds that the response includes a summary and an official link, which is modest extra value, but says nothing about error behavior for a stale id or about how translations affect the returned payload.

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; the id source and the returned artifacts are stated up front and nothing is redundant.

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 two-parameter read tool with full annotation and schema coverage, the description is nearly sufficient, and naming the summary and official link partially compensates for the absence of an output schema. Only the error/not-found path is left unaddressed.

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 100%, so the schema already explains both the id format/example and the language fallback semantics in detail. The description only restates where the id comes from and mentions the summary/link, adding no meaning beyond the schema — the baseline 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?

The description gives a specific verb ('Read') and resource ('the facts of one call'), and ties the input to sibling search_open_calls, making it easy to distinguish from the search/list siblings. The word 'facts' is slightly vague, but the clause 'with its summary and official link' concretizes what is returned.

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 implied rather than stated: an agent can infer this is the detail-lookup step after search_open_calls or list_my_matches. There is no explicit when-not guidance (e.g., use search_open_calls instead of looping this for discovery) or mention of behavior on an unknown/expired id.

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