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

Annotations already declare this as a non-readonly, destructive, non-idempotent, open-world write, so the safety profile is covered. The description adds valuable behavioral context beyond annotations by stating that the note is created immediately and becomes visible according to the note type's permissions. It does not explicitly reconcile the destructiveHint or explain duplicate behavior on repeated calls.

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?

The description is compact and front-loaded with the WRITE marker and the core action. Every sentence contributes either the action, the visibility effect, the prerequisite lookup, or the endpoint, with no wasted text.

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 three-parameter write tool with no output schema but rich annotations, the description covers what the tool does, the immediate effect, visibility constraints, and where to get the required note type id. It is complete enough to call correctly, though it could say more about duplicate creation or the destructive-hint implication.

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 already 100%, so the baseline is 3. The description still adds meaning by explaining that the note type id should come from charliehr_list_team_member_note_types and by giving an example of a note value such as an employee number.

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 and resource: add a custom note value for one note type to a team member in Charlie. It names the relevant object and distinguishes this write operation from the sibling read/list tools such as charliehr_list_team_member_notes and charliehr_list_team_member_note_types.

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?

It clearly directs the agent to use charliehr_list_team_member_note_types to obtain the required note type id, which is useful prerequisite guidance. However, it does not explicitly state when not to use this tool or compare it against a sibling alternative for reading or managing existing notes.

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