get_snapshot_diff

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

With no annotations, the description carries the full behavioral burden and falls short. Critically, it says nothing about the action_limit parameter's semantics — that this tool consumes a budget of *mutating* actions after returning the diff — so an agent could reasonably assume this is a pure read. It also omits auth requirements, error behavior when a timestamp is invalid, and any rate limits.

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 with no filler or redundancy. It is efficient, though its brevity edges toward under-specification rather than true conciseness.

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?

An output schema exists, so return values need not be explained, and the 100% schema coverage handles parameters. However, for a tool with an undocumented side-effect budget (action_limit) and no annotations, the description is only minimally complete.

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 the schema already documents uuid, from_timestamp, to_timestamp, and action_limit (including the 'latest'/'previous' shortcuts). The description adds no parameter-level meaning beyond that, so the baseline 3 applies.

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?

Specific verb+resource: 'get the diff between two snapshots of a watched URL' clearly states what the tool returns. It does not, however, distinguish itself from the sibling get_watch_history, which an agent could plausibly confuse with snapshot comparison.

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 description offers no when-to-use guidance, no prerequisites (e.g., snapshots must already exist), and never names an alternative such as get_watch_history for listing snapshots. Usage is only faintly inferable from the phrase 'between two snapshots'.

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