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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so safety is covered. The description adds only 'Public', which usefully signals that no privileged scope is needed. It says nothing about pagination, ordering, or how far back the tape goes, which are the traits annotations cannot express.

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?

Roughly three short sentences: purpose, when, differentiation, plus a callable example. The WHEN clause is front-loaded and every clause carries routing information. The leading restatement of the tool name is the only wasted token.

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?

An output schema exists, so return shape need not be described, and annotations cover the safety profile. For a zero-required-parameter read feed, the description supplies enough to call it correctly; only the ordering/recency semantics of the tape remain unstated.

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% and both parameters (key, limit with default 30/max 80) are fully documented in the schema. The empty example 'booth_feed {}' implicitly confirms that no parameters are required, but the description adds no new semantic meaning beyond that. 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?

States a specific verb and resource ('watch the booth tape') and enumerates the event kinds it surfaces (propose/counter/accept), which tells an agent this is a read-only stream of booth negotiation activity. It also names a sibling it is not (bazaar_browse_listings). 'Tape' is jargon and the event list omits decline, so it falls short of a 5.

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 'WHEN:' clause gives an explicit trigger, and the bazaar_browse_listings contrast rules out a plausible wrong choice. It does not, however, clarify the relationship to booth_propose/booth_counter/booth_accept (whether reading the feed is a prerequisite for acting on it), so the routing guidance is clear but not exhaustive.

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