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

Annotations already declare readOnly=false, destructive=false, so the safety profile is partly covered; the description adds genuinely new context, namely that no subscription or charge occurs, that the entitlement is pre-existing, and that new connections start unassigned. Slight tension with idempotentHint=false given 'create or return', which the description never reconciles.

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 tight sentences, front-loaded with the action and entitlement constraint, then exclusions, then the next-step chain. The negative list is long but each item prevents a real misuse; no filler sentences.

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?

An output schema exists, so return-value detail is not required, and the description covers the creation semantics and downstream workflow well. The one real gap is request_id, which matters for a non-idempotent create tool where callers need to know how retries behave.

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% across two required parameters, so the description must compensate and does not: request_id (a uuid, presumably a replay/idempotency key) is never explained, and the provider parameter's single-value enum ('exa') is only implied by the prose. An agent gets no meaning beyond the raw schema.

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+resource: creating or returning a managed Exa web-search connection tied to the account's paid entitlement. The 'create or return' framing is precise. It does not, however, distinguish itself from the sibling create_connector, leaving the agent to infer which creation path applies.

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?

Explicitly sets boundaries ('Does not subscribe, charge, search, discover tools or change assignments') and gives an ordered follow-up path: connect_connector, then get_connector_tools, then explicitly set_agent_connectors. This routes the agent through the multi-step workflow better than most definitions in the sibling list.

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