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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, and the description is consistent with these. It adds useful context beyond the annotations by specifying that the manifest is public and by outlining its thematic content, which helps the agent anticipate what information will be returned.

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 sentence that front-loads the action and object ('Read the public Daystruct manifest') before a clarifying colon phrase. Every word contributes meaning, and there is no filler or redundant restatement of the title.

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, read-only, idempotent tool with strong annotations, this description is nearly complete. It names the resource, its public nature, and the topics covered. The output format is not described, but with no output schema and low complexity this is acceptable. Minor ambiguity remains around the word 'status' from the title, but it does not undermine selection.

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 the schema is trivially fully covered. Per the baseline for parameterless tools, the description does not need to explain parameter details, and it does not introduce any misleading parameter-related information.

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 uses a specific verb ('Read') and resource ('public Daystruct manifest'), and explains the manifest's conceptual content: how capabilities are discovered, checked for compatibility, and delivered. This clearly distinguishes it from sibling tools that perform discovery, preparation, or compatibility checking.

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 intended usage is implied by the phrase 'public Daystruct manifest' – an agent can infer this is for inspecting the manifest. However, there is no explicit guidance on when to choose this tool over closely related siblings like discover_daystruct_capabilities or compat_check, and no exclusion criteria are given.

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