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

Annotations already establish read-only/non-destructive safety, but the description adds meaningful behavior: fee-inclusive cheapest price per building area, price-ordered results, inclusion of fan listings open to offers, and a constraint against averages/medians/max asks. This goes beyond the annotations, though it omits pagination or result-size behavior.

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 trigger and the key output trait (cheapest fee-inclusive price, price-ordered) before the presentation guidance. Sentences are purposeful and none is filler.

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, return-shape details need not be in the description, and this read-only tool is adequately covered. Only minor gaps remain around pagination/cardinality of returned areas and listings.

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 100%, so event_id, quantity, and sections are already documented. The description only loosely alludes to these ("each area of the building", "fan listings") without adding syntax or format detail, so baseline 3 applies.

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 (reads the market / trading price for an event) and clearly distinguishes its output from mere row browsing. It does not explicitly name the sibling it contrasts with (e.g., get_ticket_listings), so an agent can infer but not confirm the alternative without reading schemas.

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 a clear trigger ("Use when the user wants to understand what an event is trading at, not just browse rows") that implicitly routes away from listing-browse tools. It lacks an explicit when-not or a named alternative tool, so the routing cue is good but not fully prescriptive.

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