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

With no annotations, the description carries the behavioral burden. It clearly signals a non-mutating 'Return' operation and adds useful detail about the returned content: each rule includes the real incident and an implementable agent-behavior constraint. It does not discuss auth or rate limits, but for a benign read-only preview this is a minor gap.

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 short and front-loaded with 'FREE', and the content-structure detail earns its place. The only slight flaw is the redundancy between 'FREE' and 'no payment required', but overall it remains compact and scannable.

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 tool with one optional parameter and no output schema, the description gives enough about what is returned and the free-access condition for an agent to call it correctly. The main gap is not explaining how it relates to fde_lessons_full, but the low complexity makes this non-blocking.

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 only parameter, 'topic', is fully described in the input schema with examples ('verify', 'cache', 'deploy'), and schema description coverage is 100%. The tool description adds no additional parameter-level meaning, so the baseline score 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 names a specific action and resource: 'Return the foundational Forward Deployed Engineering rules in full' and explains what each rule contains. It is clear, though it does not explicitly contrast this tool with sibling fde_lessons_full beyond the 'FREE' and 'foundational' framing.

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 free/no-payment phrasing and 'foundational' scope imply this is the no-cost entry-point lessons tool, but the description never explicitly says when to use it over fde_lessons_full, fde_catalogue, or fde_playbook. No exclusions or alternative conditions are given, so routing must be inferred.

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