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 covered. The description adds one piece of genuine behavioral context beyond that: the response is a partial view ("opening text and instructions", and only the first scene for warm-bath), which tells the agent it cannot get full content here.

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 short, front-loaded sentences with the return behavior stated before the warm-bath caveat. Nothing is redundant, though the middle sentence is slightly terse about what "instructions" means.

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?

With no output schema, the description does sketch the return (opening text plus instructions) and the warm-bath truncation, and annotations carry the safety semantics. What is missing is any sense of the id-to-experience mapping and whether the returned "instructions" are machine-actionable, leaving a small but real gap for a single-parameter tool.

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 0%, so the description must carry the id parameter's meaning, and it does not — it never explains what id selects or how the four enum values map to experiences beyond incidentally naming "Warm Bath." The self-describing enum values partly mitigate this, but the description fails to compensate for the documentation gap.

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?

"Enter an experience. Returns its opening text and instructions" gives a specific verb+resource and states what comes back, which is more than the bare name. It does not, however, explicitly distinguish itself from siblings list_experiences (enumerate) or explore_warm_bath (deeper exploration), leaving that inference to the reader.

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 statement, but "The Warm Bath reveals only its first scene" implicitly routes an agent wanting more of that experience toward explore_warm_bath. The remaining alternatives (list_experiences, the other three experiences) get no guidance at all.

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