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

Annotations already declare readOnly/ idempotent/ non-destructive/ closed-world, so the safety profile is covered. The description adds behavior beyond that: results are restricted to upcoming events only, and free-text matching is conjunctive ("every word must match") across title, topic, organizer and venue in Hebrew or English. It stops short of describing result shape or ordering.

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, front-loaded with the purpose and then the filter surface, with no filler. The inline tag glossary is longer than ideal but earns its space because the enum values are opaque English keys mapping to Hebrew labels.

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?

For a seven-parameter, all-optional read tool with full schema coverage and clear annotations, the description covers scope, matching semantics and tags adequately. The remaining gap is the absence of any note on return shape or sort order, which no output schema supplies.

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%, so the baseline is 3; the description does add real meaning by naming the fields the free-text query spans and its all-words-must-match rule, plus the English-to-Hebrew tag mapping that the enum alone does not convey. It adds nothing further about date_from/date_to interaction with when, or about limit behavior.

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 states a specific verb and resource ("Search upcoming meetups") and enumerates the combinable filter dimensions, so the intent is unambiguous. It does not, however, distinguish this from the sibling list_upcoming_meetups or get_meetup, leaving the agent to infer which entry point to use.

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?

"Combine any of" gives useful composition guidance for building a query, and the tool is implicitly the general discovery path. There is no explicit when-to-use versus list_upcoming_meetups or when-not guidance, and no statement that all parameters are optional and a bare call returns all upcoming meetups.

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