serial_set_signals

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

Annotations indicate destructiveHint=true, consistent with modifying signals. Description adds that DTR/RTS can be set to HIGH/LOW or left unchanged. No annotation contradiction. It does not detail error cases beyond connection not found, but this is sufficient.

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?

Description is concise with 3 short paragraphs, front-loaded purpose, then parameter details, then return format. No fluff.

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 simple input (1 param with 3 fields), output schema present, and annotations covering destructiveness, the description is complete. It explains return messages and error response.

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%, so description compensates by explaining each parameter's meaning and valid values (True/False/None). This adds value beyond schema, especially for optional parameters with defaults.

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 tool sets control signal states on a serial port connection, specifying DTR and RTS. It distinguishes from siblings like serial_get_signals (read) and serial_open (open connection).

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 (after opening a connection via serial_open), but does not explicitly mention when not to use or alternatives. Context signals show sibling tools like serial_get_signals for reading, providing differentiation.

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