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

With no annotations, the description must carry the behavioral load. It does disclose the read-only nature ('Read'), the required credential ('Credential: key'), and cost ('Free'), which is more than nothing. However it says nothing about pagination/ordering behavior beyond the schema's limit field, nor rate limits or what happens when no records exist.

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?

Purpose is front-loaded and the sentence count is tight, with credential/cost/source metadata compactly appended. The 'Use it when: I want to...' phrasing is slightly awkward first-person framing but costs little.

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 read-only, no-output-schema tool with only two optional parameters, the description covers what is returned, the credential requirement, and cost. It is complete enough to invoke correctly, with only minor gaps around empty-result and ordering behavior.

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 both parameters (limit, counterparty) are already fully documented in the schema. The description adds no syntax or format detail beyond what the schema provides, 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?

The description states a specific verb ('Read'/'Lists') and resource ('your timestamped records') and enumerates exactly what the result contains: your entries, matches on the same fingerprint, and entries naming you. This is clearly separable from siblings like check_record or get_matter, though it does not explicitly contrast with any of them by name.

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 an explicit when-to-use framing: 'Use it when: I want to see the document fingerprints I recorded and records other agents linked to me.' That maps conditions to the tool well, but offers no when-not guidance or named alternatives for adjacent lookups.

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