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

Annotations already declare readOnlyHint/idempotentHint, so the safety profile is covered; the description adds the non-obvious behavioral fact that an unlinked account yields connected=false rather than an error. That is real value beyond the structured fields, though nothing is said about caching or scopes.

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 sentences, front-loaded with the action and payload, followed immediately by the edge-case and fallback. 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?

With an output schema present, return values need not be spelled out, and the description still summarizes the payload and covers the connected=false case. Slightly incomplete in not stating any precondition about authentication for the success path, but nothing an agent needs to call it is missing.

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?

Zero parameters, so there is no parameter semantics to explain and the baseline of 4 applies. The description correctly implies the tool takes no arguments and targets the current user implicitly.

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 and resource ("Get the user's Worklittle profile") and enumerates the returned content (name, location, contact details, job preferences). It is clearly distinguishable from sibling readers like get_my_resume, which it explicitly names.

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 failure-case routing: if the account is not linked, use get_my_resume or apply_for_job to sign in. It does not explicitly frame when to prefer this over update_my_profile, but the read-oriented framing plus named alternatives gives clear context.

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