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

With no annotations, the description carries the full behavioral burden. 'Single-use' is a genuinely useful trait (the link cannot be re-consumed, so repeat calls may fail), but nothing is said about expiration, whether a fresh link is generated per call, or the auth/entitlement required.

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?

Extremely short and front-loaded with the key attribute, so it wastes no words, but it reads as an under-specified label rather than a purposeful description of the operation.

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 an undocumented required parameter, no annotations and no output schema, the definition leaves too much unexplained: what 'EA' is, what the slug resolves to, and what the returned link can be used for. An agent would have to guess.

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 for the undocumented 'slug' parameter, but it says nothing about what the slug identifies (the EA? the user? the purchase?). This leaves the sole required parameter ambiguous.

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 phrase names the resource (an EA download link) and one distinguishing attribute (single-use), so an agent can infer it retrieves a link. However it is a noun fragment with no verb and no clarification of what 'EA' means or how it differs from siblings like purchase_access or list_expert_advisors.

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 statement of when to call this versus alternatives, no prerequisite (e.g. prior purchase or entitlement), and no note on the relationship to purchase_access or list_expert_advisors. Usage must be entirely inferred.

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