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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description adds only the 'similarity scoring' mechanism, saying nothing about what is returned (e.g., scored pairs) or how the threshold interacts with results -- and no output schema exists to compensate.

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?

A single compact sentence with the action and scope front-loaded and no filler. It is efficient, though it leaves room for one clarifying clause about the output without becoming bloated.

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 4-parameter read-only tool with no output schema, the definition covers the core intent but omits the return shape -- the name suggests scored name pairs, yet neither description nor structured fields confirm this. Adequate but with a clear gap for an agent deciding whether the result fits its need.

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 75%, with limit and similarity_threshold documented inline and only workspace_id bare. The description's mention of 'similarity scoring' loosely ties to the threshold parameter but adds no format or behavior detail beyond the schema; baseline 3 is appropriate for a mostly self-documenting schema.

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 -- finding similar or duplicate event names within a source -- and names the mechanism (similarity scoring). It is distinguishable from siblings like get_source_event_schemas or get_source_event_properties, though it never explicitly contrasts itself with them.

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?

There is no explicit when-to-use or when-not-to-use guidance, and no alternatives are named. The purpose (detecting duplicate/similar event names) implies a deduplication use case, but an agent must infer the scenario on its own.

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