pause_brain

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

With no annotations, the description carries the burden but discloses only that it halts background downloading/analysis. It does not say whether the pause is immediate or waits for in-flight work, whether it is idempotent, or that resume_brain is the way back. The output schema covers return values, so that gap is acceptable.

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 front-loaded sentence naming the action first and the prerequisite second. Every clause earns its place; there is no padding or restatement of the tool name.

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 zero-parameter control operation with an output schema, the description is nearly sufficient: it says what is paused and when to call it. It would be complete with a note on whether the pause blocks until settled and a pointer to resume_brain as the counterpart.

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 tool takes zero parameters, so there are no parameter semantics to explain; the baseline for a no-param tool is 4. Schema coverage being 100% with an empty properties object confirms nothing is left undocumented.

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 (pause) and the exact resource affected (background downloading/analysis), which is more precise than the bare name suggests. It also names two sibling tools that depend on it, making its role in the workflow concrete, though it doesn't explicitly say how it differs from resume_brain.

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 parenthetical gives a clear precondition: use before merge_topics or rebuild_brain. That is real when-to-use guidance rather than mere implication. It stops short of stating when pausing is unnecessary or harmful (e.g., if nothing is running), so not a full 5.

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