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

With idempotentHint=true and destructiveHint=false already supplied by annotations, the description adds useful behavioral context: it is lightweight, self-contained, and deliberately excludes the transcript. This prevents the agent from treating the tool as a full conversation logger, which goes beyond the structured annotations.

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 three short, front-loaded clauses with no filler: it states the tool's nature, the key constraint, and the activation trigger. Every sentence contributes actionable information.

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 16-parameter tool, the description is sufficient because the schema is fully self-documenting and an output schema exists. It covers what to store (self-contained handoff, no transcript), when to store it, and how to keep checkpoints associated via session_id; the main missing piece is explicit sibling routing.

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 input schema documents all 16 parameters with descriptions, so the baseline is 3. The description adds only the 'reuse session_id' instruction, which is helpful but is already implied by the schema's session_id description; it does not significantly extend parameter understanding.

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 identifies the tool as a lightweight checkpoint for a self-contained handoff, and it immediately adds the key distinction that it does not save a transcript. It is clear about what the tool does, though it does not explicitly differentiate it from the similar palim_add_memory tool.

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?

It gives explicit operational timing—'Proactive after results and decisions'—and instructs the agent to reuse session_id, so an agent knows when and how to invoke it. It does not, however, state when not to use it or name an alternative such as palim_add_memory.

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