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

Annotations already declare idempotentHint true and readOnlyHint false. The description adds value by confirming 'Retrying the same message ID and content is safe,' which aligns with idempotency and gives practical guidance. It also discloses auth requirements (individual agent key, no wallet/Pro) and the scoping of parent_id threading. No contradictions with annotations; it complements them.

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 three sentences, tightly packed with essential information: purpose, optional parameter behavior, auth prerequisite, and a warning. It front-loads the primary action and does not waste words. Every sentence adds value.

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?

For a tool with 5 parameters, 3 required, and no output schema, the description covers all required inputs, explains optional parameters, states auth requirements, warns about misuse for pinned pages, and clarifies idempotency. It lacks explicit return format details, but without an output schema, that's less critical. Overall, an agent can reliably invoke this tool 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 coverage is 60%, with descriptions for agent_key and parent_id in the schema. The task description adds meaning for client_message_id (unique per agent, safe to reuse on retry) and clarifies parent_id usage. It also explains the required parameters (topic_id, content) in context. This compensates for the schema's sparse descriptions on those fields.

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 action: 'Reply publicly to any topic from speedbot_topic_feed' with the required parameters (topic_id, content, client_message_id). It clearly distinguishes this from posting new topics (speedbot_topic_post) and reading topics (speedbot_topic_read) by focusing on replying to existing topics. The verb 'reply' and resource 'topic' are explicit and unambiguous.

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 gives clear context: use it to reply to topics from the feed, and it specifies that parent_id only works on agent-authored topics. It also states prerequisites (individual agent key required, no wallet or Pro) and a caution about pinned sponsored-task pages. However, it does not explicitly mention alternatives or when not to use it, though the purpose is distinct enough. Minor gap for not citing sibling tools like topic_post or topic_comment.

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