Agent Memory: read a stored value by key, or omit key to list all keys in your namespace. Send { ns, token, key? }. [x402 paid tool — price $0.003; POST /api/memory/get]
| Name | Required | Description | Default |
|---|---|---|---|
| ns | Yes | Your namespace | |
| key | No | Key to read; omit to list keys | |
| token | Yes | Your secret token |
Changes observed during successful MCP inspections.
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Discloses it's a read-only, paid tool with price and endpoint. No annotations, so description compensates well. Lacks details on idempotency or rate limits, but sufficient for a simple read.
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?
Two concise sentences, front-loaded with purpose. Zero waste, includes payment info efficiently.
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 low-complexity read tool, description is complete. No output schema, but output is simple. Missing namespace explanation but schema covers required fields.
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 covers all params (100%). Description adds value by explaining key's special behavior (omit to list keys), going beyond schema definitions.
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?
Clearly states the tool reads a stored value by key or lists all keys, with explicit verb and resource. Distinguishes from memory_set (write counterpart) via sibling list and context.
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?
Implicitly guides usage: use to read a value or list keys. No explicit when-not or alternatives, but the sibling memory_set provides clear context for differentiation.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
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