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

Annotations already declare the safe read-only, idempotent, closed-world profile, so the safety bar is met structurally. The description goes further by disclosing the returned shape ('each field's id, name, type and choices'), which is genuine added value given there is no output schema. It stops short of noting pagination or ordering guarantees.

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 sentence, front-loaded with the action and resource, with the trailing clause earning its place by linking the output to the two consumer tools. No filler.

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 no output schema, the description carries the burden of describing returns and does so adequately (id, name, type, choices). For a zero-parameter read of workspace configuration it is essentially complete; only minor omissions like ordering or permission requirements remain.

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?

The tool takes zero parameters, so the baseline is 4 with nothing for the description to clarify. The schema's additionalProperties: false is consistent with the description's claim of an unfiltered workspace-wide listing.

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 (list the workspace's contact fields) and immediately scopes it ('the workspace's own fields'), then ties the output to the sibling tools that consume those ids (update_contact, get_contact). An agent can distinguish this from list_contacts or get_contact without opening any 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?

Usage is clearly implied: call this to discover the field ids that update_contact accepts and that get_contact results are keyed by. There is no competing sibling tool offering the same listing, so explicit when-not guidance is less critical, but no exclusions or prerequisites (e.g., auth level) are stated.

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