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

Annotations already establish this as a safe read (readOnlyHint=true, destructiveHint=false). The description adds real behavioral value beyond that: it enumerates the returned anchor metadata fields (txHash, blockNumber, gasUsed, explorerUrl) and explains the null-anchor edge case. It stops short of covering auth requirements or any rate limits.

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?

Two tight sentences with the primary purpose front-loaded and the null-anchor edge case appended. No filler or redundant restatement of the tool name.

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 no output schema, the description usefully sketches the return payload and the null case, and the read-only annotations cover the safety profile. For a single-parameter read tool this is largely sufficient, though chain/context and auth expectations are left unstated.

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 coverage is 100% and the single parameter's schema description even points to its origin (pcc_capture_upload), so the schema carries the load. The description adds no parameter-level detail beyond this, which is the expected baseline when schema documentation is complete.

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 ('Fetch') and resource ('combined verdict + on-chain anchor view for a single capture'), which clearly distinguishes it from list-style siblings like pcc_list_verdicts and the anchor-only pcc_capture_anchor. It is clear what the tool returns, though it does not explicitly name the sibling tools it should be chosen over.

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 only implied by 'for a single capture'; there is no explicit when-to-use guidance or routing to alternatives such as pcc_capture_anchor or pcc_list_verdicts. The mention that the anchor is null when unanchored hints at a use case but is not framed as selection guidance.

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