Comment on a post

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

Annotations set destructiveHint=false and openWorldHint=true, and the description's 'Add a comment' aligns with non-destructive write behavior. However, the description does not add behavioral traits beyond what annotations already provide, such as rate limits, visibility, or moderation.

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, focused sentence that efficiently communicates the tool's purpose with no redundancy or unnecessary words.

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 the absence of an output schema, the description is adequate for basic understanding but does not cover potential error responses, preconditions, or side effects that an agent might need for robust invocation.

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 coverage is 100% and both parameters have clear descriptions in the schema. The tool description adds no additional meaning beyond the schema, so baseline score of 3 is appropriate.

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 clearly states the action (add a comment), the resource (existing post), and the context (eToro social feed). It distinguishes itself from sibling tools like etoro_create_post by specifying commenting on existing content.

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 implies when to use (when you have a post to comment on) but lacks explicit guidance on alternatives or when not to use this tool. No mention of prerequisites or comparisons with similar sibling tools.

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