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

Annotations already mark this readOnly and closed-world, and the description adds real value beyond them: the per-issue-day hash structure, the zero-scoring convention for missed days, and the important cryptographic caveat that a hash proves file identity, not issuance time. It also discloses what the ledger deliberately withholds (scores, alerts).

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 ledger contents are front-loaded, which is good, but the prose is elliptical ('or a missed day scored as zero alerts') and mildly redundant — 'No performance score yet' and 'alerts and scores are not disclosed' largely repeat the same disclosure. Four sentences for one optional parameter is more than strictly needed.

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 only one optional parameter, no output schema, and read-only annotations, the description carries the return-value burden well: it explains the per-day hash rows, the missed-day zero convention, and the hash's verification limits. Complete enough to call correctly, though it never says what the row structure or date range defaults look like.

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% and the single `since` parameter is fully specified in the schema (pattern, UTC, YYYY-MM-DD, on-or-after semantics). The description merely restates the same filter semantics without adding format or edge-case detail, 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 resource — a dated early-warning commitment ledger — and explains its content (per issue-day SHA-256 of the forecast file and comparison arms, or a zero-scored missed day). It is distinguishable from get_early_warning_protocol by being the commitment/hash record rather than the protocol itself, though it never names that sibling to make the contrast explicit.

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?

Usage is implied by the content description, and there is a useful 'when-not' hint in 'No performance score yet; alerts and scores are not disclosed', which tells the agent not to reach for this tool seeking alerting or scoring. However, no alternative tool is named and no explicit condition for choosing this over the protocol or prediction-track-record siblings is given.

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