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

Beyond the annotations it discloses what the link grants (read, portfolio, trade) and, crucially, what is never delegated: withdrawals, API keys, and account settings. It also states that a human must press Approve within 15 minutes and that the call returns an approve_url plus a sentence to relay, which is exactly the behavioral context an agent needs.

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?

It is front-loaded with the prerequisite and the core action, and every sentence carries information about scopes, approval, or verification. It is dense with parentheticals and the trailing deposit-address/ETH-funding detail slightly dilutes the focus, but nothing is purely redundant.

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 output schema, the description must describe returns, and it does (approve_url plus a sentence), along with the next verification step. The closing note about the owner's deposit address and ~0.001 ETH for fees is useful but feels appended rather than fully integrated, leaving a small question about what the agent should do with it.

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 both parameters are already documented in the schema, so the baseline of 3 applies. The description reinforces the scope vocabulary ('read, portfolio, trade') and implicitly bounds what scopes can grant, but adds no format or constraint detail 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 names a specific verb and resource: linking this agent to the owner's EventTrader account for read and trade access. It explicitly separates itself from register_agent by noting 'no key needed' there, so an agent can place it in the onboarding sequence without opening a schema.

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 a clear prerequisite (api_key from register_agent), the human approval step the owner must perform, the 15-minute window, and the follow-up call to /link/status. It does not say when linking is unnecessary or what to do if the agent already has its own wallet or account, so there is no explicit exclusions guidance.

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