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

Annotations declare destructiveHint=true and idempotentHint=true, but the description goes further by naming the concrete side effects: it 'may waive the deposit, mark it paid, or move a payment date.' That tells the agent exactly which downstream state (matching waive_deposit, mark_deposit_paid, move_payment_date) can be touched, which annotations alone cannot convey.

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 the action and precondition, then the consequences, then the caution. No sentence is redundant and nothing is buried.

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?

With an output schema present and rich annotations, the description only needs to cover intent, gating, and side effects, all of which it does. The residual gap is that the two identifier parameters are never explained, but the approval gate and destructive consequences an agent needs are fully covered.

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 description coverage is 0%, so the description must carry all param meaning, yet it only explains 'confirmed' ('Pass confirmed true only then'). scheduleId and changeId are left to their UUID format hint alone, leaving two of three parameters materially undocumented.

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?

States a specific verb ('Apply') on a specific resource ('one suggested schedule change') and immediately implies the pairing with suggest_schedule_change by scoping to already-suggested changes. An agent can distinguish this mutation from the sibling that proposes changes without opening either schema.

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?

Gives an explicit precondition ('after the freelancer explicitly approves that change') and an exclusion ('Calling it is not a substitute for the freelancer's approval'), so the gating condition is unambiguous. It does not name suggest_schedule_change or the read/list siblings as alternatives, which keeps it short of a 5.

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