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

With no annotations, the description carries the full burden, and it does disclose the report's dimensions (uptime, staleness, success rates) and that it is ecosystem-wide. It stops short of stating that this is a non-mutating read or how it behaves for dates with no data, but the scope and content disclosure are substantial.

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?

Three tightly front-loaded sentences: purpose first, then usage, then alternatives. Every sentence carries routing or scope information with no padding.

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?

No output schema exists, and the description compensates by naming what the report returns. The single optional date parameter is fully covered by the schema, so nothing an agent needs to call this correctly is missing.

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 schema already documents the date pattern (YYYY-MM-DD) and the today default. The description only adds 'for a specific date', matching rather than exceeding the schema, so baseline 3 applies.

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 (Get) plus resource (ecosystem-wide oracle health report) and scope (all providers), and enumerates the report's contents (uptime, staleness, success rates). It explicitly distinguishes itself from get_feed_health and get_feed_freshness by name.

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?

Explicitly says when to use it ('a dated snapshot of overall health') and names both alternatives with the condition that selects each: a single feed by UUID vs. scanning current freshness across many feeds. Nothing is left to inference.

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