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

No annotations are provided, so the description carries the full burden. It does disclose a significant behavioral trait—divergence purges only the divergent partition—but lacks detail on permissions, reversibility, timing, rate limits, or return behavior.

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 a single concise sentence front-loaded with the diff operation. However, the semicolon compresses two distinct ideas and the extreme brevity borders on cryptic, reducing clarity for an agent.

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, no annotations, and one required parameter at 0% schema coverage, the description omits parameter semantics, usage context, and return behavior. It provides only high-level behavioral hints, which is not enough for correct invocation.

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 coverage is 0% and the sole required parameter 'server' is not mentioned in the description. The agent gets no meaning for what 'server' represents, its scope, or the expected format.

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 states it performs a cache-vs-origin fingerprint diff and that divergence purges the divergent partition. That is a specific technical operation, but it uses jargon and does not clearly distinguish the tool from siblings like cache_exposure_verdict or guard_tools_list.

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?

No indication is given for when to use this tool versus alternatives such as cache_exposure_verdict or guard_tools_list. There are no prerequisites, exclusions, or contextual triggers for invocation.

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