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

No annotations are provided, so the description carries the full burden. 'Diff' hints at a read-only comparison, but nothing states whether state is mutated, what permissions are required, whether live fetching occurs, or how large a payload the diff returns for nested objects.

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 short sentence that is front-loaded and free of waste. The problem is under-specification, not verbosity, so it earns only a middling score: it is concise but not informative.

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 tool with 6 parameters, nested objects, no annotations, and no output schema, the description supplies almost none of the needed context. It neither explains the parameter roles nor describes what the diff result looks like, leaving the agent to guess on nearly every call detail.

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% across 6 parameters, including three nested object parameters (published, tools_list, registry_listing). The description alludes to 'published state' and 'an escrow', touching perhaps two of the six parameters, and says nothing about fetch_live, server_name, or tools_list.

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 names a specific operation (diff) and two resources (published state, escrow), so the core intent is inferable. However, 'coverage-aware' is undefined jargon and nothing distinguishes this from siblings like retention_escrow or retention_packet.

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?

There is no guidance on when to use this tool, when to prefer retention_escrow or retention_packet, or what preconditions exist. The agent must infer that a diff is a comparison operation and guess its place in the retention workflow.

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