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

Annotations already cover the safety profile (readOnlyHint, destructiveHint=false, openWorldHint=false). The description adds real behavioral value on top: results are sorted soonest-first and each entry carries date, place, price in EGP or free, and the booking page. It omits any statement about result limits or pagination behavior, which the default-10 limit makes relevant.

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?

Two sentences with the resource and its sort/return shape front-loaded; the example questions are the only mildly redundant part and they do reinforce usage. Nothing is wasted.

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 carries the burden of describing returns and does so: ordering, per-event fields, currency handling ('or free'), and the booking link. For a simple one-parameter list tool this is complete enough to call confidently.

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?

Only one parameter (limit) and the schema already documents it fully at 100% coverage with a default and range. The description says nothing about limiting result counts or truncation behavior, so it adds no meaning beyond the schema. Baseline 3 for high schema coverage.

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?

Names a specific verb and resource ('List the Alexandria Archive's upcoming events') plus the exact category of items ('heritage walks, workshops, talks'). It is clearly distinguishable from siblings like list_recent_articles and search_archive without opening any schema.

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 concrete trigger questions ('what is on in Alexandria this week', 'a history walk in Alexandria') that map cleanly onto this tool. It does not name an alternative sibling or state when NOT to use it, so it falls short of explicit routing guidance.

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