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

Annotations already declare idempotent, non-destructive, non-readOnly, closed-world. The description adds useful default behavior for publicListing ('on by default, false opts out'), which is context beyond annotations. However no mention of auth requirements or partial-update semantics.

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?

Single concise sentence, front-loaded with the verb and fields, no waste.

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?

A mutation tool with no output schema and modest param count. Description covers publicListing default but leaves acceptsMessages behavior and auth/partial update details undocumented; annotations carry safety profile.

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 low (33%); only token is described in schema. Description explains publicListing meaning and default, and names acceptsMessages without elaborating. Does not compensate for acceptsMessages or token semantics; token LAST RESORT note is in schema, not description.

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 specific verb 'Set' with two named fields publicListing and acceptsMessages, and the title clarifies scope (visibility and messaging). This distinguishes it from siblings like mute or rotate_token.

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?

Implies usage for changing profile visibility/messaging settings but does not state when to use vs alternatives or prerequisites (e.g., authentication). No exclusions given.

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