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

The description discloses important behavioral traits beyond the annotations: it creates persistent state, performs a baseline check, consumes quota, and is not idempotent. This aligns with idempotentHint=false and readOnlyHint=false, and adds context about quota consumption and the retry caution. It does not describe return format or error handling, but the annotations already set the safety profile.

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: two sentences with the main action first, then side effects and a caution. Every sentence adds value, with no redundancy or fluff. It is front-loaded and efficiently structured.

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 description covers the core action, side effects, and idempotency, which is essential for a creation tool. However, it lacks usage guidance versus sibling tools and does not mention what happens after creation (e.g., how to retrieve the monitor ID), though no output schema exists. Given the tool's complexity and the presence of annotations, it is adequate but not fully 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?

The input schema has 100% description coverage for all six parameters, so each is already documented. The description does not add any additional semantic meaning about the parameters; it only mentions the API key in the first sentence, which is redundant with the schema. Since coverage is high, the baseline of 3 applies.

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 verb and resource: 'Create a monitor', and adds context about persistent state and baseline check. It does not explicitly distinguish from sibling tools like fluxproof_check_now or fluxproof_preflight, but the action is unambiguous and specific enough that an agent can infer the purpose.

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?

No explicit guidance is given on when to use this tool versus alternatives. The only usage-related note is a caution about retrying, which pertains to behavior rather than selection. There is no mention of prerequisites, conditions, or exclusions that would help an agent choose this over sibling tools.

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