Update Headline

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

Annotations already declare destructiveHint=true and openWorldHint=true, so the safety profile of this external mutation is covered. The description adds nothing beyond them: it never states that the existing headline is overwritten/replaced, nor any auth, session, or rate-limit behavior. With annotations doing the heavy lifting, this is a minimal but non-contradictory contribution.

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?

A single front-loaded sentence with no filler. It is efficient, though it is terse to the point of omitting useful qualifiers rather than being perfectly calibrated.

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 return value is covered by the output schema and parameter meaning by the input schema, so the description's burden is mostly behavioral. It is adequate for a simple two-parameter mutation, but it omits that the prior headline is destroyed and any indication of failure modes for a destructive open-world operation.

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% for both parameters, so the schema already documents that 'url' must be the caller's own profile and that 'new_headline' is the replacement text. The description adds no format, length, or constraint detail beyond the schema, so the baseline 3 applies.

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 (Update) and resource (headline) on a LinkedIn profile, which is easily distinguished from the sibling update_about (different profile field). It does not name or contrast siblings explicitly, but the resource is unambiguous.

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?

No when-to-use guidance, no mention of when to prefer update_about or other profile-editing tools, and no stated prerequisites (only 'must be your own profile', which lives in the schema, not the description). The agent gets the what but no context for the when.

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