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

Annotations already declare readOnly/idempotent/non-destructive/closed-world, and the description reinforces this with a concrete list of operations it does not perform (no send, no mailbox inspection, no key issuance). That negative-space disclosure is genuinely useful for preventing misinvocation, though it does not describe the response shape.

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 purpose, then a scope boundary. The enumerated workflow stages are dense but serve as a useful preview of the guide's contents; minor redundancy between 'public guidance only' and the does-not list.

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 indicating what the guide returns, which it does by listing the workflow steps. For a zero-parameter read-only guidance tool with rich annotations, nothing critical for correct invocation 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?

The tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline of 4 applies. No parameter information is omitted that an agent would need.

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 ('Read the official in-chat Partner API application workflow') and enumerates the workflow stages (partner@v3lox.com, sender confirmation, draft preview, send approval, reply verification). It is clearly distinguishable from action siblings, though it does not explicitly contrast with the adjacent get_partner_access_requirements tool.

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?

Provides clear context for use: it is public guidance, requires no TriFit account, and explicitly excludes sending email, inspecting a mailbox, submitting forms, issuing keys, or changing access. This tells the agent when not to reach for it, but it does not name which sibling to use instead for those actions.

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