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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered and the description is consistent with it (a planning/guidance tool, not a mutation). The description adds genuinely useful context beyond annotations: what the plan contains and that 'No partner key needed,' which removes a common auth blocker before the agent even attempts the call.

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?

Front-loaded with the deliverable and then the concrete steps, which lets an agent decide quickly whether this matches the request. The step enumeration is dense but earns its place as a preview of the output; the only waste is the slightly redundant restatement of intent in the second clause.

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?

For a zero-parameter, read-only, no-output-schema tool, the description is complete enough: it says what is returned (a step-by-step plan), what the plan covers, and when to call it. The only minor gap is not clarifying whether the plan is static guidance or personalized to the caller's existing account state.

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; the baseline of 4 applies. The description correctly implies no inputs are required to obtain the plan.

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 resource (the official WhatsApp Business API integration via WasapFlow Bridge) and a specific output form (a step-by-step plan), and enumerates the plan's contents: account, card, keys, webhook, Connect WhatsApp button, first message. An agent can distinguish this onboarding-plan tool from siblings like bridge_docs_search or bridge_docs_section without opening the 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?

Gives explicit routing guidance: 'Call this first when someone wants to build or connect WhatsApp.' That establishes both the trigger condition and call ordering. It does not name an alternative sibling for adjacent needs (e.g., searching docs for a specific existing integration problem), so it stops short of full when/when-not coverage.

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