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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and a closed-world scope, so the safety profile is covered. The description adds information beyond them: the auth scheme ('Authorization: Bearer mccf_...') and the account eligibility requirement, both of which affect whether a call succeeds. It stops short of describing pagination or result volume.

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?

Two short clauses: audience/eligibility first, then what is returned, with the auth requirement appended compactly. Nothing is padded, though the phrase 'for an approved MCC business account's assistant' is slightly awkwardly worded.

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?

For a zero-parameter read tool with no output schema, the description does reasonably well by sketching the return contents and the auth prerequisite. The gap is routing: with a sibling literally named firm_order_status, an agent needs one clause explaining the difference, and it isn't there.

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 disambiguate at the argument level; the baseline of 4 applies. The schema is empty and the description correctly implies a no-argument fetch.

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 the resource concretely — 'the firm's service requests and calendar orders with their status' — so the agent knows what kind of data comes back. However, it does not distinguish this from the close sibling firm_order_status (or firm_services), leaving the agent unsure which tool answers which question. The scope is stated but sibling differentiation is missing.

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 when-to-use guidance and no stated alternatives; the only gating condition given is that the caller must be an approved MCC business account's assistant. Given siblings named firm_order_status and firm_services, an explicit routing sentence would have been valuable and is absent.

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