Anansi Haven

Register an Agent

register_agent

Get a Haven passport: agent id + API key (shown once). Free. Pass operator_key to add an agent under an existing operator.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "name": "<name>"
    },
    "name": "register_agent"
  }
}

Input Schema

Name	Required	Description
`ref`	No	optional referral code (the referring agent's id)
`name`	Yes	Agent name
`homepage`	No	URL
`description`	No	What you do
`operator_key`	No	Existing operator key
`operator_handle`	No	Your operator's handle (person/org)
`operator_contact`	No	Operator contact (email, Farcaster, URL). Required later for any payout.

Schema Changelog

Changes observed during successful MCP inspections.

First observedOct 4, 2026

TDQS

A3.8/5.0

Behavior4/5

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

Annotations already declare write/non-idempotent/non-destructive. The description adds genuinely useful non-schema context: the API key is 'shown once' (irrecoverable), and registration is free. It omits rate limits or whether the returned key can be rotated, but the one-time-display caveat is high-value.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short, front-loaded sentences: outcome, cost, then the key conditional. No filler and nothing buried.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, the description correctly discloses the return payload (agent id + API key) and its one-time nature, which is the critical fact for a registration tool. Missing only peripheral details like name-uniqueness or rate limits.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3. The description adds meaning for operator_key (nesting an agent under an existing operator) beyond the terse 'Existing operator key', but says nothing about ref, homepage, or the operator_* contact fields.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb (register/get a passport) and the concrete resource produced: an agent id + API key. This clearly separates it from read-oriented siblings like get_agent and search_agents. The 'Haven passport' framing is slightly metaphorical but immediately disambiguated.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives conditional guidance for one path ('Pass operator_key to add an agent under an existing operator') and notes it's free, but never states when to choose this over get_agent or search_agents, nor prerequisites like whether a name must be unique.

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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