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

With no annotations, the description must carry the full behavioral burden. It does disclose that the check is self-contained (chain data only), requires no auth, and enumerates the three invariants tested — valuable for a verification tool. It omits what a failure looks like (boolean vs. list of broken links), whether it is purely read-only, and any cost/latency profile.

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 tight sentence with the core purpose front-loaded and the enumerated checks in a parenthetical. 'No auth needed' is a slightly abrupt tail clause but still carries real decision value.

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 one-parameter tool with no annotations and no output schema, the description covers the verification semantics well but leaves two real gaps: the meaning of the sole required parameter and the shape of the result (pass/fail vs. defect report). Adequate but not 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?

There is one parameter, agent_ref, with 0% schema description coverage, and the description never mentions it. An agent cannot tell from either source what agent_ref should contain (an ID? a chain handle? a path?) or how it relates to 'chain data alone.' The description needed to compensate here and does not.

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?

States a specific verb and resource: it 'independently checks a decision-log chain's integrity.' The parenthetical enumerates the exact invariants verified (gap-free seq, prev matching, entry anchoring), which clearly distinguishes it from siblings like verify_proof or check_anchor_status. It does not name a sibling explicitly, so it stops short of a 5.

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?

'Independently ... from chain data alone' and 'No auth needed' imply this is the self-contained verification path versus network/notary-dependent siblings, which is useful implied guidance. However, it never states when to choose this over verify_proof or check_anchor_status, nor any preconditions or exclusions.

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