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

Beyond the readOnly/idempotent/non-destructive annotations, it discloses sort order (start time), the fields returned (date, venue, starting price, sale status, url), that times are venue-local, and a prompt-injection warning about organiser-written content being data not instructions. That is substantial disclosure the annotations do not carry.

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 scope, filters, return shape, and safety caveats are front-loaded across tightly packed sentences with no filler. Every sentence carries information an agent would otherwise have to guess.

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 compensates by enumerating returned fields, and it covers the one risky adjacent action (checkout) plus injection risk. Nothing needed to invoke this six-parameter, all-optional search tool correctly is missing.

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 the schema already documents every parameter including defaults, patterns and the date-overrides-when relationship. The description restates the filtering axes without adding syntax, format or edge-case detail beyond structured fields, so the 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?

The description names a specific verb+resource ('Find upcoming live events in Sri Lanka sold on TicketsMinistry') and enumerates the covered categories, so the agent knows exactly what domain this covers. It is clearly distinguishable from get_event (single event) and list_categories_and_cities (reference data).

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?

It states the filtering axes available and gives explicit behavioral guidance ('Tickets are bought by the person on the event page... do not try to complete it for them'), which tells the agent where this tool's job ends. However, it never names or routes to sibling tools like get_event or search_help, leaving alternative-selection to inference.

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