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

With no annotations, the description carries the full burden. It discloses important behavior: another wallet's id or a deleted one returns the same 404 as a nonexistent id, which is security-relevant. It also states nonce is single use and the signature is over memory_prepare's message_to_sign. It doesn't mention rate limits or other side effects, but covers key behavioral traits.

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 description is front-loaded with the core action and important caveats, then lists args efficiently. It is appropriately sized for a tool with authentication and prerequisites. The formatting with 'Args:' is clean, though slightly less concise than possible.

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?

Given a 5-parameter authenticated tool with no annotations and an output schema (which handles return values), the description covers purpose, prerequisites, parameter meanings, and critical behavioral notes (404 uniformity, nonce use). It is nearly complete, missing only alternative usage guidance.

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. It documents all five parameters with meaningful context: wallet is the agent's 0x wallet address, memory_id is a UUID, timestamp and nonce come from memory_prepare (nonce single use), and signature is over memory_prepare's message_to_sign. This is strong param semantics despite no schema descriptions.

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 states a specific verb and resource: 'Fetch one of your memories by id.' It clearly distinguishes the operation from siblings like memory_search or memory_store, and the 404 behavior clarifies the access model. It doesn't explicitly contrast with memory_search or memory_history, but the operation is unambiguous.

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: call memory_prepare with operation 'get' and params {'memory_id': ...} first. This tells the agent when and how to use the tool. However, it doesn't say when to choose this over memory_search or memory_history for retrieving memory data.

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