a2a2p — Agent-to-Agent-to-Physical

end_co_invention_session

end a free co-invention session. Free concept selection only. No research, model run, payment, procurement or manufacture is started. The private follow token authorizes agents to read and change this session. Only its SHA-256 digest is stored. Keep it secret.

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": {
      "session_id": "<session_id>",
      "follow_token": "<follow_token>",
      "actor": "<actor>",
      "revision": "<revision>",
      "reason": "<reason>"
    },
    "name": "end_co_invention_session"
  }
}

Input Schema

Name	Required	Description	Default
`actor`	Yes
`reason`	Yes
`revision`	Yes
`session_id`	Yes
`follow_token`	Yes

Output Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 28, 2026

changedOutput schema / oneOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "concepts": {
-        "items": {
-          "additionalProperties": true,
-          "properties": {
-            "decision": {
-              "oneOf": [
-                {
-                  "type": "null"
-                },
-                {
-                  "additionalProperties": true,
-                  "properties": {
-                    "at": {
-                      "maxLength": 100,
-                      "minLength": 1,
-                      "pattern": "\\S",
-                      "type": "string"
-                    },
-                    "by": {
-                      "additionalProperties": true,
-                      "properties": {
-                        "kind": {
-                          "enum": [
-                            "person",
-                            "agent",
-                            "debbie"
-                          ]
-                        },
-                        "name": {
-                          "maxLength": 80,
-                          "minLength": 1,
-                          "pattern": "\\S",
-                          "type": "string"
-                        },
-                        "untrusted": {
-                          "type": "boolean"
-                        }
-                      },
-                      "required": [
-                        "kind"
-                      ],
-                      "type": "object"
-                    },
-                    "reason": {
-                      "maxLength": 400,
-                      "minLength": 1,
-                      "pattern": "\\S",
-                      "type": "string"
-                    }
-                  },
-                  "required": [
-                    "by",
-                    "reason",
-                    "at"
-                  ],
-                  "type": "object"
-                }
-              ]
-            },
-            "id": {
-              "maxLength": 100,
-              "minLength": 1,
-              "pattern": "\\S",
-              "type": "string"
-            },
-            "job": {
-              "oneOf": [
-                {
-                  "type": "null"
-                },
-                {
-                  "description": "deb8 job reference, if any; this adapter cannot start a job",
-                  "type": "object"
-                }
-              ]
-            },
-            "looksLikeInstruction": {
-              "type": "boolean"
-            },
-            "material": {
-              "maxLength": 3878,
-              "minLength": 1,
-              "pattern": "\\S",
-              "type": "string"
-            },
-            "provenance": {
-              "additionalProperties": true,
-              "properties": {
-                "derivedFrom": {
-                  "oneOf": [
-                    {
-                      "type": "null"
-                    },
-                    {
-                      "maxLength": 100,
-                      "minLength": 1,
-                      "pattern": "\\S",
-                      "type": "string"
-                    }
-                  ]
-                },
-                "materialDigest": {
-                  "maxLength": 64,
-                  "minLength": 64,
-                  "pattern": "\\S",
-                  "type": "string"
-                },
-                "receivedAt": {
-                  "maxLength": 100,
-                  "minLength": 1,
-                  "pattern": "\\S",
-                  "type": "string"
-                },
-                "via": {
-                  "enum": [
-                    "api",
-                    "connector",
-                    "workspace",
-                    "deb8"
-                  ]
-                }
-              },
-              "required": [
-                "via",
-                "derivedFrom",
-                "materialDigest",
-                "receivedAt"
-              ],
-              "type": "object"
-            },
-            "sessionId": {
-              "maxLength": 100,
-              "minLength": 1,
-              "pattern": "\\S",
-              "type": "string"
-            },
-            "source": {
-              "additionalProperties": true,
-              "properties": {
-                "kind": {
-                  "enum": [
-                    "person",
-                    "agent",
-                    "debbie"
-                  ]
-                },
-                "name": {
-                  "maxLength": 80,
-                  "minLength": 1,
-                  "pattern": "\\S",
-                  "type": "string"
-                },
-                "untrusted": {
-                  "type": "boolean"
-                }
-              },
-              "required": [
-                "kind"
-              ],
-              "type": "object"
-            },
-            "state": {
-              "enum": [
-                "proposed",
-                "accepted",
-                "rejected"
-              ]
-            },
-            "title": {
-              "maxLength": 120,
-              "minLength": 1,
-              "pattern": "\\S",
-              "type": "string"
-            },
-            "version": {
-              "minimum": 1,
-              "type": "integer"
-            }
-          },
-          "required": [
-            "id",
-            "sessionId",
-            "title",
-            "material",
-            "looksLikeInstruction",
-            "source",
-            "provenance",
-            "state",
-            "decision",
-            "job",
-            "version"
-          ],
-          "type": "object"
-        },
-        "type": "array"
-      },
-      "contract": {
-        "const": "a2a2p.co-invention/1.0.0"
-      },
-      "follow_token": {
-        "maxLength": 64,
-        "minLength": 1,
-        "pattern": "\\S",
-        "type": "string"
-      },
-      "follow_url": {
-        "maxLength": 300,
-        "minLength": 1,
-        "pattern": "\\S",
-        "type": "string"
-      },
-      "next": {
-        "maxLength": 1000,
-        "minLength": 1,
-        "pattern": "\\S",
-        "type": "string"
-      },
-      "session": {
-        "additionalProperties": true,
-        "properties": {
-          "agent": {
-            "additionalProperties": false,
-            "properties": {
-              "name": {
-                "maxLength": 40,
-                "minLength": 1,
-                "pattern": "\\S",
-                "type": "string"
-              },
-              "platform": {
-                "maxLength": 36,
-                "minLength": 1,
-                "pattern": "\\S",
-                "type": "string"
-              }
-            },
-            "required": [
-              "name",
-              "platform"
-            ],
-            "type": "object"
-          },
-          "domain": {
-            "maxLength": 200,
-            "minLength": 1,
-            "pattern": "\\S",
-            "type": "string"
-          },
-          "id": {
-            "maxLength": 100,
-            "minLength": 1,
-            "pattern": "\\S",
-            "type": "string"
-          },
-          "idea": {
-            "maxLength": 1750,
-            "minLength": 15,
-            "pattern": "\\S",
-            "type": "string"
-          },
-          "revision": {
-            "minimum": 1,
-            "type": "integer"
-          },
-          "state": {
-            "enum": [
-              "open",
-              "ended"
-            ]
-          }
-        },
-        "required": [
-          "id",
-          "idea",
-          "domain",
-          "agent",
-          "state",
-          "revision"
-        ],
-        "type": "object"
-      }
-    },
-    "required": [
-      "contract",
-      "session",
-      "concepts",
-      "next"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "code": {
-        "const": "rate_limited"
-      },
-      "contract": {
-        "const": "a2a2p.co-invention/1.0.0"
-      },
-      "error": {
-        "additionalProperties": false,
-        "properties": {
-          "code": {
-            "maxLength": 80,
-            "minLength": 1,
-            "pattern": "\\S",
-            "type": "string"
-          },
-          "message": {
-            "maxLength": 1000,
-            "minLength": 1,
-            "pattern": "\\S",
-            "type": "string"
-          }
-        },
-        "required": [
-          "code",
-          "message"
-        ],
-        "type": "object"
-      },
-      "rate_limit": {
-        "description": "a2a2p.rate-limit/2.0.0 receipt",
-        "type": "object"
-      }
-    },
-    "required": [
-      "contract",
-      "error"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "concepts": {
+        "items": {
+          "additionalProperties": true,
+          "properties": {
+            "decision": {
+              "oneOf": [
+                {
+                  "type": "null"
+                },
+                {
+                  "additionalProperties": true,
+                  "properties": {
+                    "at": {
+                      "maxLength": 100,
+                      "minLength": 1,
+                      "pattern": "\\S",
+                      "type": "string"
+                    },
+                    "by": {
+                      "additionalProperties": true,
+                      "properties": {
+                        "kind": {
+                          "enum": [
+                            "person",
+                            "agent",
+                            "debbie"
+                          ]
+                        },
+                        "name": {
+                          "maxLength": 80,
+                          "minLength": 1,
+                          "pattern": "\\S",
+                          "type": "string"
+                        },
+                        "untrusted": {
+                          "type": "boolean"
+                        }
+                      },
+                      "required": [
+                        "kind"
+                      ],
+                      "type": "object"
+                    },
+                    "reason": {
+                      "maxLength": 400,
+                      "minLength": 1,
+                      "pattern": "\\S",
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "by",
+                    "reason",
+                    "at"
+                  ],
+                  "type": "object"
+                }
+              ]
+            },
+            "id": {
+              "maxLength": 100,
+              "minLength": 1,
+              "pattern": "\\S",
+              "type": "string"
+            },
+            "job": {
+              "oneOf": [
+                {
+                  "type": "null"
+                },
+                {
+                  "description": "deb8 job reference, if any; this adapter cannot start a job",
+                  "type": "object"
+                }
+              ]
+            },
+            "looksLikeInstruction": {
+              "type": "boolean"
+            },
+            "material": {
+              "maxLength": 3878,
+              "minLength": 1,
+              "pattern": "\\S",
+              "type": "string"
+            },
+            "provenance": {
+              "additionalProperties": true,
+              "properties": {
+                "derivedFrom": {
+                  "oneOf": [
+                    {
+                      "type": "null"
+                    },
+                    {
+                      "maxLength": 100,
+                      "minLength": 1,
+                      "pattern": "\\S",
+                      "type": "string"
+                    }
+                  ]
+                },
+                "materialDigest": {
+                  "maxLength": 64,
+                  "minLength": 64,
+                  "pattern": "\\S",
+                  "type": "string"
+                },
+                "receivedAt": {
+                  "maxLength": 100,
+                  "minLength": 1,
+                  "pattern": "\\S",
+                  "type": "string"
+                },
+                "via": {
+                  "enum": [
+                    "api",
+                    "connector",
+                    "workspace",
+                    "deb8"
+                  ]
+                }
+              },
+              "required": [
+                "via",
+                "derivedFrom",
+                "materialDigest",
+                "receivedAt"
+              ],
+              "type": "object"
+            },
+            "sessionId": {
+              "maxLength": 100,
+              "minLength": 1,
+              "pattern": "\\S",
+              "type": "string"
+            },
+            "source": {
+              "additionalProperties": true,
+              "properties": {
+                "kind": {
+                  "enum": [
+                    "person",
+                    "agent",
+                    "debbie"
+                  ]
+                },
+                "name": {
+                  "maxLength": 80,
+                  "minLength": 1,
+                  "pattern": "\\S",
+                  "type": "string"
+                },
+                "untrusted": {
+                  "type": "boolean"
+                }
+              },
+              "required": [
+                "kind"
+              ],
+              "type": "object"
+            },
+            "state": {
+              "enum": [
+                "proposed",
+                "accepted",
+                "rejected"
+              ]
+            },
+            "title": {
+              "maxLength": 120,
+              "minLength": 1,
+              "pattern": "\\S",
+              "type": "string"
+            },
+            "version": {
+              "minimum": 1,
+              "type": "integer"
+            }
+          },
+          "required": [
+            "id",
+            "sessionId",
+            "title",
+            "material",
+            "looksLikeInstruction",
+            "source",
+            "provenance",
+            "state",
+            "decision",
+            "job",
+            "version"
+          ],
+          "type": "object"
+        },
+        "type": "array"
+      },
+      "contract": {
+        "const": "a2a2p.co-invention/1.1.0"
+      },
+      "follow_token": {
+        "maxLength": 64,
+        "minLength": 1,
+        "pattern": "\\S",
+        "type": "string"
+      },
+      "follow_url": {
+        "maxLength": 300,
+        "minLength": 1,
+        "pattern": "\\S",
+        "type": "string"
+      },
+      "next": {
+        "maxLength": 1000,
+        "minLength": 1,
+        "pattern": "\\S",
+        "type": "string"
+      },
+      "session": {
+        "additionalProperties": true,
+        "properties": {
+          "agent": {
+            "additionalProperties": false,
+            "properties": {
+              "name": {
+                "maxLength": 40,
+                "minLength": 1,
+                "pattern": "\\S",
+                "type": "string"
+              },
+              "platform": {
+                "maxLength": 36,
+                "minLength": 1,
+                "pattern": "\\S",
+                "type": "string"
+              }
+            },
+            "required": [
+              "name",
+              "platform"
+            ],
+            "type": "object"
+          },
+          "domain": {
+            "maxLength": 200,
+            "minLength": 1,
+            "pattern": "\\S",
+            "type": "string"
+          },
+          "id": {
+            "maxLength": 100,
+            "minLength": 1,
+            "pattern": "\\S",
+            "type": "string"
+          },
+          "idea": {
+            "maxLength": 1750,
+            "minLength": 15,
+            "pattern": "\\S",
+            "type": "string"
+          },
+          "revision": {
+            "minimum": 1,
+            "type": "integer"
+          },
+          "state": {
+            "enum": [
+              "open",
+              "ended"
+            ]
+          }
+        },
+        "required": [
+          "id",
+          "idea",
+          "domain",
+          "agent",
+          "state",
+          "revision"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "contract",
+      "session",
+      "concepts",
+      "next"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "code": {
+        "const": "rate_limited"
+      },
+      "contract": {
+        "const": "a2a2p.co-invention/1.1.0"
+      },
+      "error": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "maxLength": 80,
+            "minLength": 1,
+            "pattern": "\\S",
+            "type": "string"
+          },
+          "message": {
+            "maxLength": 1000,
+            "minLength": 1,
+            "pattern": "\\S",
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "message"
+        ],
+        "type": "object"
+      },
+      "rate_limit": {
+        "description": "a2a2p.rate-limit/2.0.0 receipt",
+        "type": "object"
+      }
+    },
+    "required": [
+      "contract",
+      "error"
+    ],
+    "type": "object"
+  }
+]

AddedOct 26, 2026

TDQS

B3.4/5.0

Behavior4/5

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

With no annotations, the description carries the burden and does substantial work: it discloses that nothing downstream is started and that the follow token grants read and change authority while only its SHA-256 digest is persisted. What is missing is whether ending is reversible, what state the session is left in, and whether the token is invalidated afterwards.

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

Conciseness4/5

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

Four short sentences, front-loaded with the action and its scope exclusions, then the credential warning. No filler, though the token-handling detail could be tightened and the secrecy warning is the only line that is not strictly about invocation.

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

Completeness3/5

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 no explanation, and the no-side-effect disclosure plus token rules cover the main risk of a terminal mutation. Still, an unannotated write operation with a concurrency field (revision) and actor identity should say what a wrong revision does or whether the session can be reopened.

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

Parameters2/5

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, and it only partly does: follow_token is explained as a secret bearer credential whose digest is stored. The other four required inputs — revision (presumably an optimistic-concurrency guard), actor, reason and session_id — receive no semantic explanation at all, leaving the caller to guess at revision/actor usage.

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?

'End a free co-invention session' states a specific verb and resource, and the follow-up sentence narrows scope to free concept selection so it is distinguishable from decide_co_invention_session or feed_co_invention_session. It does not explicitly name the sibling it complements, but the lifecycle position is unambiguous.

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?

The description tells the agent what this tool does NOT trigger (no research, model run, payment, procurement or manufacture), which is real exclusion guidance. However, it never says when to end a session versus when to decide, steer or feed one, so tool selection among the co-invention siblings remains inferred.

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

All a2a2p — Agent-to-Agent-to-Physical tools Inspect

Try in Browser

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Glama MCP Gateway

Add one secure layer between your agents and this server.