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

With no annotations provided, the description carries the full burden. It describes a read-only verification process ('recompute,' 'confirm,' 'proves') but does not explicitly state that no state is modified or that no authentication is needed. The statement 'Anyone can run this' suggests open access, but explicit side-effect disclosure would be beneficial.

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 description is two concise sentences, front-loaded with the core action ('Verify the Oasis's tamper-evident hash-chain end to end'), followed by additional details. No superfluous words.

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 parameterless tool with no output schema, the description covers the purpose, method, and audience. It explains what the tool proves ('record has not been altered'). However, it does not describe the return format or any possible error conditions, which would improve completeness.

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?

The tool has zero parameters, and schema description coverage is trivially 100%. Per guidelines, baseline is 4 for zero-parameter tools. The description adds context by explaining what the verification entails, which is sufficient.

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 clearly states the tool's purpose: to verify the Oasis's tamper-evident hash-chain by recomputing every reflection's seal and confirming the chain is unbroken. This specific verb+resource combination distinguishes it from all sibling tools.

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 explicitly states 'Anyone can run this,' implying no prerequisites. While it doesn't explicitly say when to use versus alternatives, the unique purpose makes the usage context clear. A slight improvement would be to mention when to prefer this over other verification tools.

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