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

With no annotations at all, the description carries the full behavioral burden, yet it only implies a read-style verification. It says nothing about permissions required, what a failed or tampered result looks like, side effects, or return format.

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?

A single front-loaded sentence with no filler, so it is appropriately sized. It leans toward under-specification rather than verbosity, which is a completeness concern rather than a conciseness one.

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?

A verification tool with no annotations and no output schema needs the description to carry the meaning of 'loop-breaking controls' and the result of the check. The one-liner does not, so an agent lacks enough context to interpret or rely on the outcome.

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?

The tool takes zero parameters, so there is nothing for the description to compensate for; the baseline for a no-parameter tool applies. No parameter syntax or meaning is missing.

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 pairs a specific verb (Verify) with a stated target (loop-breaking controls) and the condition (on and untampered), which is more than a tautology. However, 'loop-breaking controls' is undefined domain jargon, and it offers no contrast with siblings like egress_check or telemetry_report, so an agent cannot confidently place it in the toolset.

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?

There is no statement of when this check should be run versus alternatives such as egress_check or telemetry_report, nor any prerequisites or exclusions. Usage is entirely left to inference.

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