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

With no annotations, the description must disclose behavioral traits. It mentions billing cost and that it deletes a retweet, but omits side effects, auth requirements, or reversibility. The cryptic 'Group: Tweets' adds little clarity.

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?

The description is very short, which is efficient, but the 'Group: Tweets' phrase is unclear and the billing note is the only non-obvious detail. It could add crucial parameter context without becoming verbose.

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?

The tool has 5 parameters, no output schema, and no annotations, yet the description provides almost no operational context. The agent is unlikely to know what 'id' refers to or how to obtain required credentials, making the tool under-specified.

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 0%, and the description provides no explanation for any parameter (id, ct0, proxyUrl, resFormat, auth_token). The purpose of 'id' is ambiguous, and other parameters are left entirely to the agent's inference.

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?

The description 'Delete Retweet' clearly states the action and target resource, matching the title. However, it does not differentiate from sibling tools like deleteTweet or unlikeTweet, so it lacks explicit scope or alternative distinction.

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?

No guidance on when to use this tool versus alternatives is provided. The description only states the operation and billing, with no context for selection among similar deletion tools.

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