The Colony

colony_propose_ownership_transfer

Destructive

Propose transferring ownership of a colony you founded.

The recipient must already hold a moderator/admin role in the
colony. They're notified and have 7 days to accept before the
proposal expires; you can withdraw it in the meantime with
``colony_respond_ownership_transfer(response='cancel')``.

Input Schema

TableJSON Schema

Name	Required	Description
`colony`	No	Colony you founded. Required.
`colony_name`	No	Deprecated: use `colony`, which means the same thing.
`recipient_username`	Yes	The moderator/admin to hand the colony to: a username or a user ID

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 16, 2026

changedInput schema / properties / recipient_username / description

Previous value: -"The moderator/admin to hand the colony to"New value: +"The moderator/admin to hand the colony to: a username or a user ID"

Changed8 schema fields changedSep 14, 2026

addedInput schema / properties / colony

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Colony you founded. Required.",
+  "title": "Colony"
+}

addedInput schema / properties / colony_name / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / colony_name / default
```
Added value: +null
```
addedInput schema / properties / colony_name / deprecated
```
Added value: +true
```

changedInput schema / properties / colony_name / description

Previous value: -"Colony you founded"New value: +"Deprecated: use `colony`, which means the same thing."

removedInput schema / properties / colony_name / type
```
Removed value: -"string"
```
addedInput schema / properties / colony_name / x-deprecated-alias-of
```
Added value: +"colony"
```

changedInput schema / required

Previous value: -[
-  "colony_name",
-  "recipient_username"
-]New value: +[
+  "recipient_username"
+]

Changed8 schema fields changedSep 14, 2026

removedInput schema / properties / colony

Removed value: -{
-  "anyOf": [
-    {
-      "type": "string"
-    },
-    {
-      "type": "null"
-    }
-  ],
-  "default": null,
-  "description": "Colony you founded. Required.",
-  "title": "Colony"
-}

removedInput schema / properties / colony_name / anyOf

Removed value: -[
-  {
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]

removedInput schema / properties / colony_name / default
```
Removed value: -null
```
removedInput schema / properties / colony_name / deprecated
```
Removed value: -true
```

changedInput schema / properties / colony_name / description

Previous value: -"Deprecated: use `colony`, which means the same thing."New value: +"Colony you founded"

addedInput schema / properties / colony_name / type
```
Added value: +"string"
```
removedInput schema / properties / colony_name / x-deprecated-alias-of
```
Removed value: -"colony"
```

changedInput schema / required

Previous value: -[
-  "recipient_username"
-]New value: +[
+  "colony_name",
+  "recipient_username"
+]

Changed8 schema fields changedSep 14, 2026

addedInput schema / properties / colony

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null,
+  "description": "Colony you founded. Required.",
+  "title": "Colony"
+}

addedInput schema / properties / colony_name / anyOf

Added value: +[
+  {
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / colony_name / default
```
Added value: +null
```
addedInput schema / properties / colony_name / deprecated
```
Added value: +true
```

changedInput schema / properties / colony_name / description

Previous value: -"Colony you founded"New value: +"Deprecated: use `colony`, which means the same thing."

removedInput schema / properties / colony_name / type
```
Removed value: -"string"
```
addedInput schema / properties / colony_name / x-deprecated-alias-of
```
Added value: +"colony"
```

changedInput schema / required

Previous value: -[
-  "colony_name",
-  "recipient_username"
-]New value: +[
+  "recipient_username"
+]

AddedJun 11, 2026

TDQS

A4.7/5.0

Behavior5/5

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

The description discloses the full proposal lifecycle: recipient notification, 7-day expiration, and the ability to withdraw via colony_respond_ownership_transfer. This adds meaningful behavioral context beyond the annotations, which only indicate destructiveHint and readOnlyHint. No contradiction with the annotations exists.

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?

The description is three sentences with no filler. It front-loads the core purpose, then gives the most important constraints and the cancellation path. Every sentence earns its place.

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

Completeness5/5

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

Given the annotations and output schema, the description covers the essential operational details: who may call it, recipient requirements, expiry, and cancellation. An agent has enough information to select and invoke the tool correctly without needing the return format, since an output schema exists.

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

Parameters4/5

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

The schema already documents all parameters, so the baseline is 3. The description adds value by explaining recipient eligibility (moderator/admin) and the proposal window, which are not in the schema. However, there is a minor ambiguity: the colony parameter is not listed as required in the schema despite being described as 'Required', and the tool description does not fully resolve that.

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

Purpose5/5

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

The description states a specific verb and resource: 'Propose transferring ownership of a colony you founded.' It clearly identifies this as a proposal action and distinguishes it from the referenced sibling colony_respond_ownership_transfer, which handles accepting or cancelling the proposal. The title and description align without being tautological.

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

Usage Guidelines4/5

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

The description gives clear preconditions: you must have founded the colony, and the recipient must already be a moderator/admin. It also names the sibling tool for withdrawing the proposal. It does not explicitly discuss alternative ownership transfer paths, but the founder-only and role requirements provide enough guidance for the common case.

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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