getBeaconStateValidatorById

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

The description mentions 'full details' but does not specify what those details include (e.g., status, balance, effective balance). No annotations are provided, so the description carries the full burden, yet it omits behavioral traits like read-only nature, response size, or any rate limits.

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 clear sentence with no unnecessary words. It is front-loaded and directly states the tool's purpose.

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?

Given the complexity of a beacon chain validator (with many possible fields), the description does not explain the output format or how the three parameters relate. Sibling tools exist but no differentiation is provided. Lacks completeness for an agent to understand the full context.

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 input schema covers 100% of parameters with descriptions, so the tool description adds no additional meaning. Baseline score of 3 is appropriate; the description does not enhance parameter understanding beyond the schema.

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 retrieves full details for a specific Beacon Chain validator by index or public key, using a specific verb ('get') and resource ('Beacon Chain validator'). It distinguishes from related siblings like getBeaconStateValidators (plural) and getBeaconStateValidatorBalances.

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?

No guidance is provided on when to use this tool versus alternatives (e.g., getBeaconStateValidators for a list, or getBeaconStateValidatorBalances for balances). The description lacks usage context, prerequisites, or exclusions.

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