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

With no annotations, the description carries the full burden. It does disclose that a wallet_api_token from /access/login and an application api_key are required, which signals an authenticated read. However, it discloses nothing about rate limits, empty-result behavior, or the shape of what is returned beyond 'a json object'.

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 opening sentence is duplicated verbatim, wasting the most prominent line, and the trailing '@return: a json object' is filler. The parameter lines are useful, so the text earns its place except for that redundancy.

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 simple read-only list tool with three documented credentials, the definition covers invocation adequately. It falls short on the return contract — '@return: a json object' tells the agent nothing about device fields or pagination, and there is no output schema to fill that gap.

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 is the only source of parameter meaning — and it supplies it for all three: api_key (application key), token (wallet token from /access/login), and wallet_fk (also from /access/login). That is meaningful compensation for a completely undocumented 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?

States a specific verb and resource — returns devices registered to receive push messages on a wallet. This distinguishes it from the sibling push_message_send (which sends rather than lists), though the description never names that sibling explicitly.

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 guidance on when to call this versus alternatives such as push_message_send, nor any prerequisites beyond the parameter list. The agent must infer that this is the read-side companion to push_message_send.

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