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

Annotations already declare readOnlyHint=false, destructiveHint=false, idempotentHint=false, and openWorldHint=true, so the write/non-destructive profile is covered. The description adds useful context by explaining that an existing guess is *moved* (removed from the guess pool) rather than copied, and by naming the `say` output field, which is otherwise undocumented. It still omits auth requirements, what happens when neither parameter is supplied, and whether repeating the call is safe.

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?

Two short sentences, front-loaded with the core action and followed by the mechanics and the return hint. The only waste is that the opening sentence duplicates the tool title verbatim.

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?

With no output schema, the description does the right thing by naming the `say` summary field, but it stops there. For a tool with zero required parameters, an agent needs to know what happens on an empty call and what distinguishes a successful confirm, and neither is addressed.

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 baseline is 3. The description restates the schema's own wording — 'a guess (id)' and 'text the person stated' — and only lightly clarifies that the two are alternative modes rather than a combined input, so it adds little beyond the structured fields.

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 states a concrete action (persisting a confirmed guess or stated text into the career record) with two distinct paths keyed to the `id` and `text` parameters. It is distinguishable from near siblings like delete_note, note_about_me, or save_standard_answers, though the vague pronoun 'something' and the undefined term 'career record' keep it from being fully precise.

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 by the trigger phrase 'something the person confirmed,' which tells the agent this is a post-confirmation persistence step rather than a capture step. However, no alternative is named (e.g. when to use note_about_me or save_standard_answers instead) and there is no explicit when-not condition.

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