ab_read

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

With no annotations, the description lacks behavioral details such as non-destructiveness, error behavior, or permissions. The read operation is likely safe, but no confirmation is provided.

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?

Single concise sentence with no redundancy. While brief, it efficiently conveys the core action, though some contextual expansion could be beneficial.

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 simplicity of the tool and the existence of an output schema (not shown), the description is minimally adequate but lacks context about data scope and relationship to 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 coverage is 100% with descriptions for both parameters. The description adds no additional semantic value beyond what the schema already provides.

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 'Read absolute bytes from PLC' clearly states the verb and resource, but does not differentiate from sibling tools like db_read or eb_read, which may also read from the PLC.

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 on when this tool should be used versus alternatives, nor any conditions or prerequisites. The description is too brief to inform an agent on usage context.

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