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

Annotations already declare readOnlyHint=false and destructiveHint=true, so the mutation/destructive nature is covered. The description adds practical behavioral context: the need to resolve IDs first, the warning against confusing post_id and comment_id, and the caution against passing invalid values. It does not contradict annotations and provides additional process-level transparency.

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 dense but well-organized, with the core purpose front-loaded. It uses line breaks to separate Post ID and Comment ID instructions, making it scannable. While it repeats some schema content, every sentence serves a purpose (resolution steps, exclusions, account_id handling). It is not overly verbose for a tool with such a high risk of ID confusion.

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 tool's complexity (requires resolving both post and comment) and the absence of an output schema, the description covers the essential steps to call it correctly: how to obtain both IDs, what not to pass, and how to handle the optional account_id. It does not describe return values, but that is not required without an output schema. The guidance is sufficient for an agent to execute the action correctly.

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%, so the baseline is 3. The description largely mirrors the schema's parameter descriptions for post_id and comment_id, adding little new meaning. However, it does reinforce the resolution workflow and explicitly warns against passing text/URLs, which is slightly more than the schema alone. Still, the added value is marginal, keeping the score at 3.

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 opens with a clear verb+resource: 'React to one exact comment.' It explicitly distinguishes itself from related tools by focusing on comments rather than posts or reaction removal. Sibling tools like linkedin_react_to_post and social_remove_comment_reaction are implicitly differentiated by the 'exact comment' scope and the resolution steps.

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 provides explicit when-to-use guidance: it requires resolving post -> comment before acting, and names specific resolver tools (linkedin_search_posts, linkedin_list_user_posts, etc.) and their output fields. It also gives clear 'never pass' exclusions for each ID, preventing common misuse. This goes beyond vague context to actionable rules.

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