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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=false, idempotentHint=false). The description adds behavior annotations don't carry: a fixed $0.50 charge per call, which explains the non-idempotent billing side effect and is genuinely useful for agent cost decisions. It stops short of describing how results are ordered or returned.

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 purpose and price are front-loaded in two compact sentences. The final fragment ('Choosing between quotes without missing the cheapest…') reads like an unfinished sentence and adds little, but overall there is almost no waste.

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 annotations explaining return values, the description should say more about what 'name the best offer' produces (single winner? ranked table? rationale?). The critical gap is the opaque 'documents' input format, leaving the definition only marginally complete for a billed tool.

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?

There is one parameter, 'documents', an array of strings with 0% schema description coverage. The description never explains whether those strings are file paths, document IDs, raw quote text, or URLs — the single most important thing an agent needs to supply a valid call. No value is added beyond the bare schema.

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 supplier quotes on price, terms and completeness, and name the best offer.' This clearly separates it from data-extraction siblings like fikra_extract_purchase_order or single-document analysis like fikra_analyse_supplier_quotes, and it even states the output (a named best offer).

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 trailing clause 'Choosing between quotes without missing the cheapest or the best terms' implies the use case but gives no explicit when-to-use rules, prerequisites, or named alternatives (e.g. fikra_analyse_supplier_quotes vs this comparison tool). Usage is inferable rather than stated.

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