xtalk_read

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

No annotations provided, so description carries full burden. States read operation but does not disclose side effects (e.g., marking as read), idempotency, or authentication requirements. The term 'last messages' is vague without ordering or count details.

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?

Single sentence, no waste. However, it is overly minimal, lacking structure for an agent to parse usage context. Could be expanded slightly without losing conciseness.

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?

With 3 parameters, no output schema, and no annotations, the description is incomplete. Does not specify return format, behavior for empty threads, or relationship between parameters (e.g., room and thread).

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 33% (only 'room' is described). The tool description does not explain any parameters, despite low coverage. Missing meaning for 'count' and 'thread' beyond schema types.

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 'Read the last messages in a thread' clearly identifies the verb 'read' and the resource 'last messages in a thread'. It distinguishes from siblings like xtalk_broadcast and xtalk_reply, though lacks context about reading from a specific room.

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 vs alternatives (e.g., xtalk_thread_list, xtalk_listen). Does not state prerequisites or limitations like room membership.

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