GetObjectNodeFromCache

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

With no annotations, the description adds behavioral context: indicates read-only operation, mentions cache as data source, and notes expansion of OBJECT_URI. However, it omits details like error handling or staleness.

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, efficient sentence without redundancy. It front-loads the critical '[read-only]' tag and covers the essential functionality.

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 simple cache-read tool with full schema coverage, the description is largely complete. It identifies inputs, data source, and a key behavior (expansion). Missing return details are not critical given the tool's simplicity.

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% with simple descriptions. The tool description restates the parameter names but adds no substantial meaning beyond the schema, except mentioning expansion of OBJECT_URI which is a behavior, not parameter semantics.

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 it returns a node from the in-memory cache by three keys, which aligns with the name. However, it does not explicitly differentiate from sibling Get* tools that may retrieve from other sources.

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 description lacks guidance on when to use this tool versus alternatives. Only a '[read-only]' hint is provided, but no explicit conditions or exclusions.

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