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

Annotations already declare non-read-only, idempotent, non-destructive, and closed-world. The description adds real value beyond them: it scopes the mutation ('Changes only the name'), states a precondition ('Requires a connected account'), and notes the 60-character limit. It does not describe error behavior or what a failed set returns, so it falls short of a 5.

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?

Three short sentences, front-loaded with the action, then the workflow trigger, then the constraints. No filler and nothing buried.

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 2-parameter mutation with no output schema, the description covers purpose, prerequisite, mutation scope, and field constraints. Only the post-call outcome (e.g., whether the retry succeeds automatically) is unaddressed, which is minor.

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 0%, so the description must carry the load, and it does: it identifies first_name as required and states both fields cap at 60 characters. That is meaningful compensation, though it does not explain format or validation rules beyond length.

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 (Set) and resource (first and last name on your SocialLoop profile), and clarifies scope with 'Changes only the name'. An agent can distinguish this from update_partner_profile, update_member_setup, or other profile-mutating siblings without opening a schema.

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?

Gives an explicit trigger condition ('use this when a publish says Complete your profile, then retry') and ties it to the publishing workflow. This tells the agent exactly when this tool is the right choice rather than a generic profile update.

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