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

With no annotations, the description carries the full burden and does reasonably well: it discloses the tokenisation prerequisite, cross-references the enabling tool, and describes the return shape (a JSON object with results under "values"). It omits any note on auth/session requirements beyond the PIN or on pagination, but covers the non-obvious behavioral trait (tokenisation precondition).

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?

Front-loaded with the purpose, then prerequisite, then related tool, then return shape. The @param lines are low-value chaff, but overall the structure is tight and every other sentence earns its place.

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 two-param list tool with no output schema and no annotations, the description supplies the prerequisite, the related tools, and the return envelope ("values" object). It is largely sufficient; only parameter detail and explicit sibling disambiguation are missing.

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 0%, so the description must fully compensate, but it barely does. The @param wallet_fk text ("The Netfluid wallet_fk") is circular and adds nothing, while @param pin adds only that it is a wallet PIN. Neither clarifies format, validity, or security implications for these two required params.

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?

States a specific verb (Returns) and resource (the wallet's tokenised Visa/Mastercards), which is concrete enough to distinguish it from most siblings. However, it does not distinguish itself from the adjacent sibling netfluid__wallet_card_list, leaving ambiguity about card-type scope.

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?

Gives a clear prerequisite for the returned data (a card must have one prior 3D secure transaction, routing the agent to payment_3d_secure_link) and names the follow-up action tool (wallet_visa_mastercard_recharge). It stops short of explicitly stating when NOT to use it versus wallet_card_list.

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