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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered by structured data. The description contributes the content-level constraint that the returned material must be presented as education, not advice, which is genuinely useful beyond annotations, but it says nothing about the nature or format of the legal URLs returned.

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?

Two short sentences with no filler; the returned artifact is named first and the important caveat is placed second where it is still visible at a glance. Every clause carries information.

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?

With no parameters, an output schema that documents the return shape, and annotations carrying the safety profile, the description covers what an agent needs to call it correctly. It is slightly incomplete in not clarifying what 'educational fence' actually contains or how the legal URLs should be surfaced to a user.

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 tool takes zero parameters, so the baseline is 4 and there is no semantic gap for the description to fill. Nothing in the description conflicts with the empty 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 names a specific verb ('Return') and a specific resource ('canonical educational fence and legal URLs'), which lets an agent distinguish it from content-retrieval siblings like get_guide or get_site_posture. The only weakness is the jargon term 'educational fence', which the description never unpacks.

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 states a content caveat ('Education only, not financial advice') but gives no when-to-use condition and no explicit statement about when to prefer this over get_guide, get_note, or get_site_posture. The agent must infer that this is the tool for legal/disclaimer text purely from the resource name.

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