v1_facebook_post_comments

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

No annotations provided, so description carries full burden. Discloses cost (1 credit), limitation on top comments, and a safety warning about treating responses as data. Lacks details on error handling, pagination, or rate limits.

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 sentences, each adding distinct value: purpose and limitation, endpoint and cost, safety warning. No wasted words, front-loaded with core action.

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?

Covers essentials: action, input, cost, safety, and a key limitation. Missing return value description, but for a simple read tool with no output schema, this is acceptable. Could mention how to provide FB_SESSION.

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?

Single parameter 'url' with schema coverage 100%. Description adds 'Requires one of url' which is slightly redundant given the schema. Does not add format or syntax details beyond schema description.

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?

Description clearly states the purpose ('Get the comments on a Facebook post by URL') and specifies a limitation ('embedded top comments; full list needs FB_SESSION'). It distinguishes from sibling tools by mentioning this limitation, but could more explicitly differentiate from other Facebook comment tools.

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?

Minimal usage guidance. Mentions 'full list needs FB_SESSION' implying authentication requirement, but does not specify when to use this tool versus siblings like v1_facebook_post or v1_facebook_post_comment_replies. No conditions for when not to use.

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