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

No annotations are provided, so the description must carry the full burden. It implies a read-only discovery operation but does not explicitly disclose safety, side effects, return format, or limitations. The content list gives some idea of what is returned, but behavioral traits are largely unaddressed.

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 a single, concise sentence that front-loads the purpose ('Glyt service discovery') and then lists the key items in a clear colon-separated format. There is no redundant or wasted language.

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?

The tool has no parameters, no output schema, and no annotations, so the description must provide sufficient context. It enumerates three content areas but does not specify the response format or how the 'how to verify' part is delivered. It also lacks guidance on when to prefer this tool over siblings, making it minimally adequate but incomplete.

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 input schema is empty (0 parameters), so per rubric baseline is 4. There are no parameter details to explain; the description provides no parameter information and none is needed.

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 this is 'Glyt service discovery' and enumerates specific resources (issuer did:key, receipt schema version, offline verification instructions). It distinguishes itself from sibling action-focused tools by being an informational/discovery tool, though it lacks an explicit verb like 'retrieves' or 'returns'.

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: the phrase 'how to verify receipts offline' suggests this tool should be used when offline receipt verification is needed. However, it does not explicitly state when to use this tool versus siblings like verify_receipt or get_receipt, nor does it mention any exclusions.

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