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

No annotations are provided, so the description carries the full behavioral burden. 'List' implies a read-only registry lookup, but the description does not discuss pagination behavior, response size, permissions, or whether filtering is applied server-side; for a low-risk list tool this is adequate but not rich.

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 sentences, front-loads the main action and resource, and then adds a concise discovery use case. Every sentence contributes without repetition.

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 schema is rich and fully described, but there is no output schema and the description only vaguely says 'metadata.' For a discovery tool with seven filters and no annotations, it would benefit from more detail about returned feed fields or intended workflow positioning against sibling tools.

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 description coverage is 100%, so the schema already documents all seven parameters, including enums for provider and category. The description names most filter dimensions but omits limit/offset and adds no syntax or defaulting details beyond the schema, so baseline 3 is appropriate.

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 states a specific verb and resource: list oracle feeds from the registry. It also names the optional filter dimensions and frames the tool as a discovery/metadata lookup, which helps distinguish it from price, health, and incident tools. It stops short of explicitly differentiating itself from close siblings such as get_symbols or get_coverage.

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 phrase 'Useful for discovering available feeds and their metadata' gives implied usage guidance, but the description does not state when to use this tool instead of sibling discovery or lookup tools. There are no explicit exclusions or alternative-routing instructions.

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