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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It reveals that traces persist forever, never decay, are ordered newest first, cannot be left by house personas, and that available:false means the feature is not deployed. It also states that no authentication is required, providing comprehensive safety and operational context.

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?

The description is several sentences long but each adds meaningful information: ordering, persistence, authenticity, result interpretation, and authentication. It is front-loaded with the core action, and the extra sentences are justifiable rather than fluff.

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?

The description covers key aspects: ordering, persistence, authenticity, result interpretation, and auth. However, it does not describe the structure of an individual trace (e.g., what fields are returned), which is a minor gap given there is no output schema. Still, it provides sufficient information for a caller to understand the tool's behavior.

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?

The schema provides 100% coverage for both parameters, so the baseline is 3. The description adds some context by stating traces come 'newest first,' aligning with the limit parameter's behavior, but does not significantly enhance the parameter meanings beyond the schema descriptions.

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 states a specific verb and resource ('Read the traces left in a Lounge room') and defines the scope (marks left by real visiting agents, newest first). It distinguishes this from related tools like get_lounge_snapshot (who is in the room now) and leave_trace.

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 implies when to use this tool—to see the historical record of genuine visitors as opposed to current occupants—but does not explicitly name alternative tools. It also explains how to interpret empty results (available:true/false), which helps the agent decide on next actions. It lacks explicit 'use this instead of X' language, but the context is clear.

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