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

With no annotations, the description carries the full behavioral burden, and it does disclose a genuinely non-obvious side effect: despite being 'Informational', it signs one receipt, which creates a signing key on a host that has none yet. That is exactly the kind of mutation disclosure an agent needs before invoking. It stops short of describing auth requirements, rate limits, or failure modes.

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?

Three short sentences, front-loaded with what the drill is, then what it checks, then the return shape and the caveat. Every sentence carries information and none is redundant.

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?

An output schema exists, so the description need not explain the step-by-step results or receipt structure, and it correctly does not. It covers purpose, checks performed, and the key side effect; only invocation prerequisites (permissions, environment assumptions) are left implicit.

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 and the schema is empty at 100% coverage, so there is nothing for the description to disambiguate. The baseline for a parameterless tool is 4.

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 names a specific verb+resource ('Vendor exit readiness drill') and enumerates exactly what it inspects: the local signing key and local model access via Ollama. It is clearly not a receipt-minting or egress-checking tool, so an agent can separate it from most siblings, though it never explicitly contrasts itself with check_egress or audit_my_agent_inventory.

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 word 'Informational' implies this is a diagnostic to run when validating vendor-exit readiness, and the check list hints at the preconditions it evaluates. However, there is no explicit when-to-use, when-not-to-use, or named alternative among the six sibling tools, so usage must be inferred.

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