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

With no annotations, the description carries the burden and discloses the returned facts: lowest new price today, retailer counts, tracked low/high/average, verdicts, and comparison page when available. It also states the price-only limitation, but does not explicitly confirm read-only behavior or error handling.

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?

Front-loads the comparison purpose and output facts, then gives the input source and scope limitation. Every sentence adds value, and the description is appropriately sized.

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, the description explains the return content well and notes the comparison page is conditional. It is nearly complete, but omits explicit read-only/error behavior, which matters slightly more given the absence of annotations.

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 coverage is 100% with examples, so the baseline is 3. The description adds useful provenance by instructing the agent to use model_ids from search_golf_prices, which goes beyond the schema's example strings.

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: side-by-side UK price comparison for two golf models, with the exact output facts listed. It distinguishes itself from search_golf_prices by requiring model_ids from that tool and explicitly limits scope to prices, not performance.

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?

Clearly says to use model_ids from search_golf_prices and that the tool compares prices only, not performance. However, it does not name alternatives for single-model lookup (get_golf_price) or budget-based browsing (best_golf_under_budget).

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