bookshelf_get_config_host_by_id

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

The annotation readOnlyHint=true already signals a safe read operation. The description adds no additional behavioral context such as error handling, authentication requirements, or response structure. It merely restates the read intent without disclosing any non-obvious traits.

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, front-loaded sentence with no filler words. It efficiently conveys the core action and target, making it easy for an agent to parse.

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 tool has a simple one-parameter schema and an output schema, so a verbose description is not required. However, the description lacks any context about what a 'config host' is, how to obtain the id, or any preconditions. For a simple get operation, this is minimally adequate but leaves gaps.

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 0%, so the description must compensate. It only says 'by id', which does not explain what the 'id' parameter represents beyond its name in the schema. No detail is given on how to obtain the id, format constraints, or relationship to other entities.

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 'Fetch a single config host by id' uses a specific verb ('Fetch') and clearly identifies the resource ('config host') and the scope ('by id'). This distinguishes it from sibling tools like 'bookshelf_get_config_host' (which likely lists all hosts) and 'bookshelf_update_config_host'.

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 provides no guidance on when to use this tool versus alternatives. It does not mention that this should be used when a specific host ID is known, nor does it point to list endpoints for obtaining IDs. There is no exclusion or alternative reference, leaving the agent to infer usage from the name.

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