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

The annotations already declare readOnlyHint=true and openWorldHint=true. The description adds useful behavioral context by detailing the output: 'a ranked list of regulations that may apply, plus a risk indicator (LOW/MODERATE/HIGH)'. This goes beyond what annotations provide.

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 two sentences, front-loaded with the core purpose ('Pre-flight regulatory check') and includes both examples and outcome. Every sentence contributes meaningful information with no redundancy.

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?

The tool has a clear output described (ranked list + risk indicator) despite no output schema. It explains the domain (compliance) and primary use case. However, it doesn't discuss limitations or how results interact with other compliance tools, leaving a slight gap in context.

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 100%, so baseline is 3. The description adds value through concrete examples of natural-language action descriptions ('process EU resident biometric data', 'transfer health records...'), clarifying what the action parameter should contain. It also implicitly demonstrates how jurisdiction can be embedded, though the separate jurisdiction parameter is not explicitly described.

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's function: 'Pre-flight regulatory check' with a specific verb and resource. It distinguishes itself from sibling tools by positioning itself as 'The primary tool for runtime compliance gating in autonomous agent workflows'.

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 the tool: before an action, as a 'pre-flight' check. It also asserts primary status for compliance gating, but does not explicitly mention when not to use it or name alternatives. The context is clear, but exclusions are absent.

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