serial_status

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

Annotations indicate readOnlyHint, idempotentHint, and nondestructive nature, which the description supports by describing a read-only status check. It adds context about physical disconnection detection and health field indication, providing useful behavioral insight beyond annotations.

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 concise and well-structured: main purpose followed by details of what is reported, then parameter explanation. No unnecessary words, and every sentence serves a purpose.

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 no output schema, the description itemizes what is reported (connection health, bytes, parameters) making the tool's return value sufficiently clear. For a status tool with one optional parameter and safe annotations, it is complete.

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 0%, so the description fully compensates by explaining the session_id parameter: it is the port name, optional if only one session is open, and if omitted with multiple sessions, returns a summary. This adds critical meaning not present in the schema.

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 retrieves serial session status including connection health, bytes buffered, total bytes received, connection parameters, and health status. It uses a specific verb 'Get' and resource 'serial session status', effectively distinguishing it from sibling tools like serial_list_sessions or serial_get_signals.

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 explains when to use the tool and the behavior of the optional session_id parameter, including what happens if omitted. However, it does not explicitly mention when not to use it or list alternatives among siblings, missing a clear differentiation.

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