x_snapshot_compare

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

The description contradicts the annotations: annotations set openWorldHint=false, while the description states that not-observed records are not proof of deletion or unfollowing, which is an open-world claim about absence. This is a serious inconsistency that could mislead an agent about how to interpret results.

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 two sentences with no unnecessary filler. The core purpose is front-loaded, and the interpretational caveat is brief yet valuable.

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?

There is no output schema and no description of what the comparison returns, so an agent cannot know the result shape. The tool is simple, but the absence of return semantics, usage guidance, and the open-world contradiction leave meaningful gaps.

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 compensate, but it only says 'two snapshots' without mapping to the 'before' and 'after' parameters or explaining their ordering. The parameter names imply meaning, but the description adds little beyond the schema.

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 states the tool compares two snapshots of the same source, which names a specific verb and resource. It does not explicitly contrast itself with sibling tools like x_snapshot_read or x_snapshot_list, but the 'compare' action makes its distinct purpose fairly apparent.

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 guidance is given about when to use this tool instead of related snapshot tools, nor are prerequisites like snapshot ordering or validity discussed. The only usage constraint is that both snapshots must be of the same source.

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