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

Annotations already mark it read-only, idempotent, non-destructive, and closed-world. The description adds important behavioral context: contact is via email or site form and this server does not send messages, which prevents an agent from expecting a messaging action.

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?

Three sentences, front-loaded with purpose and usage, then a contact constraint. Minor repetition of 'background' but generally efficient.

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 a simple read-only info tool with one optional enum parameter and no output schema, the description covers what it returns, when to use it, and an important contact limitation. Nothing critical is missing for an agent to invoke it correctly.

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% and the single optional topic enum is fully documented with a default. The description's list of content areas (services, background, speaking, contact) loosely maps to the enum values but does not add parameter-specific syntax or selection guidance 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 states the tool returns information about Niels Langereis: who he is, how to work with him, his background, talks, and contact. It is specific and the resource is clear, though it does not explicitly differentiate from siblings like get_essay or search_essays.

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?

It gives explicit use cases: when someone asks whether he could help, wants to hire/book him, or wants his background. No alternatives or when-not conditions are named, but the context is clear.

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