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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and destructiveHint=false, so the safety profile is covered. The description adds that the data is the 'public' profile and which fields come back, which is useful given no output schema, but it says nothing about permissions or scoping requirements for profile_id/phone_number_id.

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 front-loaded sentence with a colon-delimited field list; nothing is redundant and the resource is identified before the return payload.

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 two required params and no output schema, the enumerated field list usefully substitutes for a return-value spec, and the annotations carry the safety profile. Only missing piece is any hint about where profile_id/phone_number_id originate (the schema partially covers this via 'profiles_placements').

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 100% for both parameters, so the baseline is 3. The description only loosely echoes the phone-number dimension and adds no format, source, or lookup guidance beyond what the schema already documents for profile_id and phone_number_id.

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 (read) and resource (public WhatsApp business profile for a phone number), then enumerates the exact fields returned (about, address, description, email, websites, vertical, profile_picture_url). The read-only framing cleanly separates it from the sibling whatsapp_business_profile_update and whatsapp_business_profile_photo_update.

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?

There is no explicit when-to-use statement, no exclusions, and no routing to alternatives such as whatsapp_business_profile_update or profiles_list. The scope 'for a phone number' hints at the context, but the agent must infer when this tool is the right pick.

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