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

No annotations are provided, so the description carries the full burden. It discloses the return contents (producer, timestamp, transactions) but does not mention behavior for missing slots, whether transactions are full objects or hashes, or any potential size/performance considerations. It is adequate but not richly transparent.

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, well-structured sentence that front-loads the action and resource, then lists the key included fields. No unnecessary words or 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?

For a simple single-parameter get-by-slot tool, the description is reasonably complete. It names the input and the main output fields, and no output schema exists to fill in return-value details. Minor gaps remain around error behavior and transaction representation, but the core usage is covered.

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% because the slot parameter already has a description ('Block slot number'). The tool description adds 'by slot number' but no further semantic detail beyond what the schema provides, so the baseline of 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 clearly states the tool gets block details by slot number and enumerates key fields (producer, timestamp, transactions). This distinguishes it from sibling tools like get_transaction (transaction-level) and list_recent_blocks (which enumerates blocks rather than fetching a specific one).

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 'by slot number' gives a clear condition for when to use this tool: when a specific slot is already known. It does not explicitly name alternatives or exclusions, but the usage context is unambiguous enough.

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