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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds real value by revealing the session is guided and interactive and that selection can be automatic, but it is silent on defaults (e.g. minutes when omitted) and on what happens if both technique and situation are supplied. No contradiction with the read-only annotation, since this is a passive guided exercise rather than a state mutation.

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?

Two sentences, front-loaded with the verb and resource, with the technique list doing useful work and the second sentence covering invocation. No filler or restated title boilerplate.

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?

No output schema exists, but annotations carry the safety profile and the description covers the main decision (technique vs situation). For a zero-required-parameter, non-destructive session starter this is nearly sufficient; only default duration and post-session behavior are 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%, so all three parameters are already documented in the schema and 3 is the baseline. The description adds some meaning by giving example situation strings and clarifying the technique-or-situation selection path, but it does not explain the minute bounds or which input wins on conflict.

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?

Opens with a specific verb ("Starts") plus the resource ("guided, interactive calming exercise") and scopes it to pain and stress relief, then enumerates all seven techniques so the agent knows exactly what will run. This distinguishes it clearly from siblings like check_nervous_system_state or start_focus_session.

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?

Gives concrete invocation guidance: supply a technique, or supply a situation (with examples such as "can't sleep", "panicking", "flare") to let the tool auto-select. It stops short of stating when to prefer this over a sibling focus or nervous-system tool, so routing exclusions are left implicit.

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