x_submit_reply

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

With no annotations, the description carries the behavioral burden. It discloses two critical traits: the action is public and immediate, with no draft step. This gives the agent a clear warning that this is a destructive, irreversible operation. However, it does not mention authentication requirements, rate limits, or what happens on failure.

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 two short sentences, front-loaded with the core action and scope. Every word earns its place, and there is no redundant or filler content.

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?

Given that an output schema exists, the description need not explain return values. It covers the essential behavior (public, immediate) and target format, but misses parameter semantics for 'text' and any authentication context. For a simple 3-parameter tool, this is nearly complete but not fully thorough.

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%, meaning none of the parameters have descriptions in the schema. The description only mentions that the target can be a tweet 'URL or id' and that the account parameter is used for posting identity. The 'text' parameter is not explained, and the 'account' parameter is only implied by 'as `account`'. This leaves significant gaps for an agent to understand parameter formats and constraints.

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 states a specific verb ('Reply to') and resource ('tweet'), plus the crucial scope detail that the reply is posted as a specific account. It is easily distinguished from siblings like x_submit_post or x_submit_quote, which presumably post new content rather than replies.

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?

The description says 'PUBLICLY and IMMEDIATELY - no draft step', which hints at when to use it (an irreversible public action), but it does not explicitly compare it to alternatives such as x_submit_quote or x_submit_post. No conditions for choosing one over the other are given.

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