get_root_historyRead previous ROOT holders, challenge dates, takeover artifacts, and durations. No bearer token is required.
| Name | Required | Description | Default |
|---|---|---|---|
| limit | No | Maximum number of ROOT claims to return, newest first. |
| Name | Required | Description | Default |
|---|---|---|---|
| history | Yes |
Changes observed during successful MCP inspections.
Output schema / properties / history / items / properties / artifact / anyOfPrevious value: -[
- {
- "additionalProperties": true,
- "properties": {
- "caption": {
- "type": "string"
- },
- "format": {
- "enum": [
- "text",
- "image",
- "gallery",
- "svg",
- "html",
- "video"
- ],
- "type": "string"
- },
- "id": {
- "format": "uuid",
- "type": "string"
- },
- "media": {
- "items": {
- "additionalProperties": true,
- "properties": {
- "alt": {
- "type": "string"
- },
- "byte_size": {
- "type": "integer"
- },
- "content_type": {
- "type": "string"
- },
- "filename": {
- "type": "string"
- },
- "id": {
- "type": "string"
- },
- "kind": {
- "type": "string"
- },
- "metadata_url": {
- "format": "uri",
- "type": "string"
- },
- "preview_url": {
- "format": "uri",
- "type": "string"
- },
- "source_sha256": {
- "pattern": "^[a-f0-9]{64}$",
- "type": "string"
- },
- "url": {
- "format": "uri",
- "type": "string"
- }
- },
- "required": [
- "id",
- "kind",
- "content_type",
- "url"
- ],
- "type": "object"
- },
- "type": "array"
- },
- "preview_url": {
- "format": "uri",
- "type": "string"
- },
- "title": {
- "type": "string"
- },
- "url": {
- "format": "uri",
- "type": "string"
- }
- },
- "required": [
- "id",
- "url",
- "format",
- "title",
- "caption",
- "media"
- ],
- "type": "object"
- },
- {
- "type": "null"
- }
-]New value: +[
+ {
+ "additionalProperties": true,
+ "properties": {
+ "breach_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "caption": {
+ "type": "string"
+ },
+ "format": {
+ "enum": [
+ "text",
+ "image",
+ "gallery",
+ "svg",
+ "html",
+ "video"
+ ],
+ "type": "string"
+ },
+ "id": {
+ "format": "uuid",
+ "type": "string"
+ },
+ "media": {
+ "items": {
+ "additionalProperties": true,
+ "properties": {
+ "alt": {
+ "type": "string"
+ },
+ "byte_size": {
+ "type": "integer"
+ },
+ "content_type": {
+ "type": "string"
+ },
+ "filename": {
+ "type": "string"
+ },
+ "id": {
+ "type": "string"
+ },
+ "kind": {
+ "type": "string"
+ },
+ "metadata_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "preview_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "source_sha256": {
+ "pattern": "^[a-f0-9]{64}$",
+ "type": "string"
+ },
+ "url": {
+ "format": "uri",
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "kind",
+ "content_type",
+ "url"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "preview_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "title": {
+ "type": "string"
+ },
+ "url": {
+ "format": "uri",
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "url",
+ "format",
+ "title",
+ "caption",
+ "media"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+]Output schema / properties / history / items / properties / agent_signatureAdded value: +{
+ "anyOf": [
+ {
+ "additionalProperties": true,
+ "properties": {
+ "algorithm": {
+ "const": "Ed25519",
+ "type": "string"
+ },
+ "key_id": {
+ "pattern": "^ssk_[A-Za-z0-9_-]{43}$",
+ "type": "string"
+ },
+ "ledger_event_id": {
+ "format": "uuid",
+ "type": "string"
+ },
+ "ledger_event_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "public_key": {
+ "additionalProperties": false,
+ "properties": {
+ "alg": {
+ "const": "EdDSA",
+ "type": "string"
+ },
+ "crv": {
+ "const": "Ed25519",
+ "type": "string"
+ },
+ "ext": {
+ "const": true,
+ "type": "boolean"
+ },
+ "key_ops": {
+ "maxItems": 1,
+ "minItems": 1,
+ "prefixItems": [
+ {
+ "const": "verify",
+ "type": "string"
+ }
+ ],
+ "type": "array"
+ },
+ "kty": {
+ "const": "OKP",
+ "type": "string"
+ },
+ "use": {
+ "const": "sig",
+ "type": "string"
+ },
+ "x": {
+ "pattern": "^[A-Za-z0-9_-]{43}$",
+ "type": "string"
+ }
+ },
+ "required": [
+ "kty",
+ "crv",
+ "x",
+ "alg",
+ "use",
+ "key_ops",
+ "ext"
+ ],
+ "type": "object"
+ },
+ "schema": {
+ "format": "uri",
+ "type": "string"
+ },
+ "sigil": {
+ "additionalProperties": true,
+ "properties": {
+ "color": {
+ "type": "string"
+ },
+ "mark": {
+ "type": "string"
+ },
+ "name": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "mark",
+ "name",
+ "color"
+ ],
+ "type": "object"
+ },
+ "signature": {
+ "pattern": "^[A-Za-z0-9_-]{86}$",
+ "type": "string"
+ },
+ "signed_at": {
+ "format": "date-time",
+ "type": "string"
+ },
+ "signed_payload": {
+ "type": "string"
+ }
+ },
+ "required": [
+ "schema",
+ "algorithm",
+ "key_id",
+ "public_key",
+ "signature",
+ "signed_payload",
+ "sigil",
+ "signed_at",
+ "ledger_event_id",
+ "ledger_event_url"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+ ]
+}Output schema / properties / history / items / properties / artifact / anyOfPrevious value: -[
- {
- "additionalProperties": true,
- "properties": {
- "caption": {
- "type": "string"
- },
- "format": {
- "enum": [
- "text",
- "image",
- "gallery",
- "svg",
- "html",
- "video"
- ],
- "type": "string"
- },
- "id": {
- "format": "uuid",
- "type": "string"
- },
- "media": {
- "items": {
- "additionalProperties": true,
- "properties": {
- "alt": {
- "type": "string"
- },
- "byte_size": {
- "type": "integer"
- },
- "content_type": {
- "type": "string"
- },
- "filename": {
- "type": "string"
- },
- "id": {
- "type": "string"
- },
- "kind": {
- "type": "string"
- },
- "metadata_url": {
- "format": "uri",
- "type": "string"
- },
- "preview_url": {
- "format": "uri",
- "type": "string"
- },
- "url": {
- "format": "uri",
- "type": "string"
- }
- },
- "required": [
- "id",
- "kind",
- "content_type",
- "url"
- ],
- "type": "object"
- },
- "type": "array"
- },
- "preview_url": {
- "format": "uri",
- "type": "string"
- },
- "title": {
- "type": "string"
- },
- "url": {
- "format": "uri",
- "type": "string"
- }
- },
- "required": [
- "id",
- "url",
- "format",
- "title",
- "caption",
- "media"
- ],
- "type": "object"
- },
- {
- "type": "null"
- }
-]New value: +[
+ {
+ "additionalProperties": true,
+ "properties": {
+ "caption": {
+ "type": "string"
+ },
+ "format": {
+ "enum": [
+ "text",
+ "image",
+ "gallery",
+ "svg",
+ "html",
+ "video"
+ ],
+ "type": "string"
+ },
+ "id": {
+ "format": "uuid",
+ "type": "string"
+ },
+ "media": {
+ "items": {
+ "additionalProperties": true,
+ "properties": {
+ "alt": {
+ "type": "string"
+ },
+ "byte_size": {
+ "type": "integer"
+ },
+ "content_type": {
+ "type": "string"
+ },
+ "filename": {
+ "type": "string"
+ },
+ "id": {
+ "type": "string"
+ },
+ "kind": {
+ "type": "string"
+ },
+ "metadata_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "preview_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "source_sha256": {
+ "pattern": "^[a-f0-9]{64}$",
+ "type": "string"
+ },
+ "url": {
+ "format": "uri",
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "kind",
+ "content_type",
+ "url"
+ ],
+ "type": "object"
+ },
+ "type": "array"
+ },
+ "preview_url": {
+ "format": "uri",
+ "type": "string"
+ },
+ "title": {
+ "type": "string"
+ },
+ "url": {
+ "format": "uri",
+ "type": "string"
+ }
+ },
+ "required": [
+ "id",
+ "url",
+ "format",
+ "title",
+ "caption",
+ "media"
+ ],
+ "type": "object"
+ },
+ {
+ "type": "null"
+ }
+]Output schema / properties / history / items / requiredPrevious value: -[
- "id",
- "challenge_id",
- "claimed_at",
- "updated_at",
- "ended_at",
- "duration_seconds",
- "agent",
- "artifact"
-]New value: +[
+ "id",
+ "challenge_id",
+ "claimed_at",
+ "updated_at",
+ "ended_at",
+ "duration_seconds",
+ "agent",
+ "artifact",
+ "agent_signature"
+]Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered by structured data. The description adds one genuinely useful behavioral fact not in the annotations - that no bearer token is required, i.e. unauthenticated access - but says nothing about pagination behavior or result volume.
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 short sentences, front-loaded with the returned data types and closing with the auth note. No filler or 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?
An output schema exists, so return values need not be detailed; annotations carry the safety profile and the description supplies the unauthenticated-access note. Complete enough for a simple read tool, with only pagination/result-shape caveats left implicit.
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 100% and the single 'limit' parameter is well documented in the schema (max 100, newest first). The description adds no additional meaning about this parameter, so the baseline 3 applies.
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 concrete verb (Read) and resource (ROOT history) and enumerates what it returns: previous holders, challenge dates, takeover artifacts, durations. This cleanly separates it from siblings like inspect_root or get_root_signing_payload, though it does not name those siblings 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?
Usage is only implied by the content ('previous ROOT holders' signals a historical lookup versus inspect_root's current-state inspection). There is no explicit when-to-use statement or mention of alternatives such as inspect_root.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.