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

Annotations already indicate readOnlyHint=true and idempotentHint=true, so no safety contradiction exists. The description adds meaningful behavioral detail beyond annotations: results are sorted by soonest deadline, limited to 25 by default and 100 max, and filtered to calls that close before the event starts.

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?

Three crisp sentences deliver the core purpose, return contents, ordering, limits, and an important filter condition. There is no redundancy or filler; every sentence adds value.

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 simple read-only list tool with three optional, well-documented parameters and no output schema, the description adequately explains what will be returned (conferences with deadlines and links), how results are ordered, and the applicable limits and filters. Nothing critical 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 three parameters (limit, topic, within_days) are already fully documented. The description adds some context about defaults and limits but does not meaningfully enhance parameter understanding beyond the schema, so the baseline 3 is appropriate.

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 clearly identifies the tool's purpose: finding conferences currently accepting speaker submissions, and specifies what is returned (deadline and submission link). It is also distinguishable from siblings like events_open_for_sponsorship by focusing on speaker calls rather than sponsorship.

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?

The description gives strong context for when this tool is appropriate—when you need open calls for speakers with deadlines and links. However, it does not explicitly state when to prefer an alternative or mention exclusions relative to sibling tools, leaving some inference to the agent.

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