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

No annotations are provided, so the description carries the full burden for a mutation tool. It does not say what permissions are required, whether renaming is reversible, what happens to speakers omitted from the list, or whether an unknown speaker ID causes an error.

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, with the example embedded rather than appended. Nothing 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 mutation tool with no annotations and no output schema, the description says nothing about return values, failure modes, or side effects on already-labelled speakers. An agent can guess the happy path but not the consequences of a partial or invalid call.

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%, so the baseline is 3; the description adds value by showing the id-to-label relationship concretely with 'S1 -> João Silva', clarifying that the array maps identifier to real name rather than replacing values arbitrarily.

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?

Names a specific verb (updates) and two concrete resources (transcription title, speaker labels) with a mapping example (S1 -> João Silva). The operation is clearly distinct from get/list/delete siblings, though no sibling is named explicitly.

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?

The phrase 'e/ou' implies that title and speakers may be supplied independently or together, which is a mild usage hint. It never states when to call this versus get_transcription or delete_transcription, nor any precondition such as needing speakers already identified.

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