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

Adds genuinely useful context beyond annotations by disclosing a fixed $0.30 per-call charge, which explains the non-read-only annotation (metered operation). However, it omits other behavioral facts an agent needs: whether the charge applies on error, whether the call is synchronous or long-running, and why readOnlyHint is false for what is logically an analysis operation.

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, purpose front-loaded, with cost stated up front rather than buried. The closing sentence is close to redundant with the first but does carry a usage framing, so the waste is minimal.

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 no output schema and no parameter documentation, the description should explain the shape of the comparison result (e.g. a diff of mismatched line items) and the document input format. It does neither, leaving an agent unable to prepare a correct call or anticipate the response for a paid operation.

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% and the single 'documents' array parameter is completely undocumented. The description implies the array should carry two items (two PO versions, or one PO plus one quote), which is real added meaning, but it says nothing about item format (file path, URL, ID, or raw text), count limits, or ordering semantics.

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 and resource ('Compare PO versions') and enumerates the two comparison modes: PO-to-PO and PO-to-quote. Sibling tools like fikra_compare_quotations and fikra_compare_invoices are separable by resource name, though the description never explicitly contrasts itself with them.

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?

'Confirming an order matches what was agreed' gestures at the intended use case, but there is no explicit when-to-use / when-not guidance and no named alternative (e.g. fikra_compare_quotations for quote-vs-quote work). An agent must infer the decision boundary from the resource name alone.

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