Skip to main content
Glama

Cherami

by to.cherami
OverviewDiscussionsAdmin

Send email

send_message
Destructive

Send an email to recipients the assignment authorizes, or, with in_reply_to, a reply whose recipients and subject you choose.

Input Schema

NameRequiredDescriptionDefault
ccNoCc recipients.
toYesTo recipients.
bccNoBcc recipients; other recipients do not see them.
htmlNoOptional HTML alternative to the plain-text body.
textYesPlain-text message body.
labelsNoLabels for the saved sent copy; recipients do not see them.
subjectYes
inbox_idYesInbox to send from.
attachmentsNo
in_reply_toNoFor a reply: the Cherami ID of a received or accepted sent message in this inbox, not an RFC Message-ID.
idempotency_keyNoMakes a retry safe: repeating the call with the same key and identical arguments within 24 hours of the first request returns the original attempt instead of sending again. Use a new key for each intended email.

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed7 schema fields changed
    • changedInput schema / properties / bcc / description
      Previous value: -"Bcc recipients, hidden from delivered recipient headers."New value: +"Bcc recipients; other recipients do not see them."
    • changedInput schema / properties / idempotency_key / description
      Previous value: -"Use a unique key per intended email. Retain the key, exact payload and first request time; reuse them only for that attempt within 24 hours."New value: +"Makes a retry safe: repeating the call with the same key and identical arguments within 24 hours of the first request returns the original attempt instead of sending again. Use a new key for each intended email."
    • changedInput schema / properties / in_reply_to / description
      Previous value: -"For a reply: the received or accepted sent message's Cherami ID in this inbox, not an RFC Message-ID. Supply recipients and subject explicitly."New value: +"For a reply: the Cherami ID of a received or accepted sent message in this inbox, not an RFC Message-ID."
    • changedInput schema / properties / inbox_id / description
      Previous value: -"Your sending inbox ID."New value: +"Inbox to send from."
    • changedInput schema / properties / labels / description
      Previous value: -"Labels for the saved copy only."New value: +"Labels for the saved sent copy; recipients do not see them."
    • removedInput schema / properties / subject / description
      Removed value: -"Explicit subject, including for replies."
    • changedOutput schema / anyOf
      Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "idempotency_expires_at": {
-        "description": "End of retry-key protection. Retrying an uncertain send after this instant can send it again.",
-        "type": "string"
-      },
-      "limited": {
-        "const": false,
-        "type": "boolean"
-      },
-      "message": {
-        "anyOf": [
-          {
-            "additionalProperties": false,
-            "properties": {
-              "created_at": {
-                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
-                "type": "string"
-              },
-              "error_code": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "id": {
-                "type": "string"
-              },
-              "in_reply_to": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "inbox_id": {
-                "type": "string"
-              },
-              "labels": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "recipient_count": {
-                "maximum": 9007199254740991,
-                "minimum": 0,
-                "type": "integer"
-              },
-              "status": {
-                "const": "accepted",
-                "description": "Accepted by the email provider, not confirmation of delivery.",
-                "type": "string"
-              },
-              "thread_id": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              }
-            },
-            "required": [
-              "id",
-              "inbox_id",
-              "thread_id",
-              "created_at",
-              "recipient_count",
-              "error_code",
-              "in_reply_to",
-              "labels",
-              "status"
-            ],
-            "type": "object"
-          },
-          {
-            "additionalProperties": false,
-            "properties": {
-              "created_at": {
-                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
-                "type": "string"
-              },
-              "error_code": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "guidance": {
-                "type": "string"
-              },
-              "id": {
-                "type": "string"
-              },
-              "in_reply_to": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "inbox_id": {
-                "type": "string"
-              },
-              "labels": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "recipient_count": {
-                "maximum": 9007199254740991,
-                "minimum": 0,
-                "type": "integer"
-              },
-              "status": {
-                "enum": [
-                  "rejected",
-                  "unknown"
-                ],
-                "type": "string"
-              },
-              "thread_id": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              }
-            },
-            "required": [
-              "id",
-              "inbox_id",
-              "thread_id",
-              "created_at",
-              "recipient_count",
-              "error_code",
-              "in_reply_to",
-              "labels",
-              "status",
-              "guidance"
-            ],
-            "type": "object"
-          }
-        ]
-      },
-      "outcome_persisted": {
-        "const": true,
-        "type": "boolean"
-      },
-      "replayed": {
-        "type": "boolean"
-      }
-    },
-    "required": [
-      "limited",
-      "message",
-      "outcome_persisted"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "guidance": {
-        "type": "string"
-      },
-      "idempotency_expires_at": {
-        "description": "End of retry-key protection. Retrying an uncertain send after this instant can send it again.",
-        "type": "string"
-      },
-      "limited": {
-        "const": false,
-        "type": "boolean"
-      },
-      "message": {
-        "anyOf": [
-          {
-            "additionalProperties": false,
-            "properties": {
-              "created_at": {
-                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
-                "type": "string"
-              },
-              "error_code": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "id": {
-                "type": "string"
-              },
-              "in_reply_to": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "inbox_id": {
-                "type": "string"
-              },
-              "labels": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "recipient_count": {
-                "maximum": 9007199254740991,
-                "minimum": 0,
-                "type": "integer"
-              },
-              "status": {
-                "const": "accepted",
-                "description": "Accepted by the email provider, not confirmation of delivery.",
-                "type": "string"
-              },
-              "thread_id": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              }
-            },
-            "required": [
-              "id",
-              "inbox_id",
-              "thread_id",
-              "created_at",
-              "recipient_count",
-              "error_code",
-              "in_reply_to",
-              "labels",
-              "status"
-            ],
-            "type": "object"
-          },
-          {
-            "additionalProperties": false,
-            "properties": {
-              "created_at": {
-                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
-                "type": "string"
-              },
-              "error_code": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "guidance": {
-                "type": "string"
-              },
-              "id": {
-                "type": "string"
-              },
-              "in_reply_to": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              },
-              "inbox_id": {
-                "type": "string"
-              },
-              "labels": {
-                "items": {
-                  "type": "string"
-                },
-                "type": "array"
-              },
-              "recipient_count": {
-                "maximum": 9007199254740991,
-                "minimum": 0,
-                "type": "integer"
-              },
-              "status": {
-                "enum": [
-                  "rejected",
-                  "unknown"
-                ],
-                "type": "string"
-              },
-              "thread_id": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              }
-            },
-            "required": [
-              "id",
-              "inbox_id",
-              "thread_id",
-              "created_at",
-              "recipient_count",
-              "error_code",
-              "in_reply_to",
-              "labels",
-              "status",
-              "guidance"
-            ],
-            "type": "object"
-          }
-        ]
-      },
-      "outcome_persisted": {
-        "const": false,
-        "type": "boolean"
-      },
-      "replayed": {
-        "type": "boolean"
-      }
-    },
-    "required": [
-      "limited",
-      "message",
-      "outcome_persisted",
-      "guidance"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "idempotency_expires_at": {
+        "description": "Until this time, a retry with the same idempotency_key returns this send; after it, the same key sends again.",
+        "type": "string"
+      },
+      "limited": {
+        "const": false,
+        "type": "boolean"
+      },
+      "message": {
+        "anyOf": [
+          {
+            "additionalProperties": false,
+            "properties": {
+              "created_at": {
+                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
+                "type": "string"
+              },
+              "error_code": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "id": {
+                "type": "string"
+              },
+              "in_reply_to": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "inbox_id": {
+                "type": "string"
+              },
+              "labels": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "recipient_count": {
+                "maximum": 9007199254740991,
+                "minimum": 0,
+                "type": "integer"
+              },
+              "status": {
+                "const": "accepted",
+                "description": "Accepted by the email provider, not confirmation of delivery.",
+                "type": "string"
+              },
+              "thread_id": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id",
+              "inbox_id",
+              "thread_id",
+              "created_at",
+              "recipient_count",
+              "error_code",
+              "in_reply_to",
+              "labels",
+              "status"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": false,
+            "properties": {
+              "created_at": {
+                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
+                "type": "string"
+              },
+              "error_code": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "guidance": {
+                "type": "string"
+              },
+              "id": {
+                "type": "string"
+              },
+              "in_reply_to": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "inbox_id": {
+                "type": "string"
+              },
+              "labels": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "recipient_count": {
+                "maximum": 9007199254740991,
+                "minimum": 0,
+                "type": "integer"
+              },
+              "status": {
+                "enum": [
+                  "rejected",
+                  "unknown"
+                ],
+                "type": "string"
+              },
+              "thread_id": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id",
+              "inbox_id",
+              "thread_id",
+              "created_at",
+              "recipient_count",
+              "error_code",
+              "in_reply_to",
+              "labels",
+              "status",
+              "guidance"
+            ],
+            "type": "object"
+          }
+        ],
+        "description": "The saved send. Check status: a successful call can still return rejected or unknown."
+      },
+      "outcome_persisted": {
+        "const": true,
+        "type": "boolean"
+      },
+      "replayed": {
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "limited",
+      "message",
+      "outcome_persisted"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "guidance": {
+        "type": "string"
+      },
+      "idempotency_expires_at": {
+        "description": "Until this time, a retry with the same idempotency_key returns this send; after it, the same key sends again.",
+        "type": "string"
+      },
+      "limited": {
+        "const": false,
+        "type": "boolean"
+      },
+      "message": {
+        "anyOf": [
+          {
+            "additionalProperties": false,
+            "properties": {
+              "created_at": {
+                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
+                "type": "string"
+              },
+              "error_code": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "id": {
+                "type": "string"
+              },
+              "in_reply_to": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "inbox_id": {
+                "type": "string"
+              },
+              "labels": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "recipient_count": {
+                "maximum": 9007199254740991,
+                "minimum": 0,
+                "type": "integer"
+              },
+              "status": {
+                "const": "accepted",
+                "description": "Accepted by the email provider, not confirmation of delivery.",
+                "type": "string"
+              },
+              "thread_id": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id",
+              "inbox_id",
+              "thread_id",
+              "created_at",
+              "recipient_count",
+              "error_code",
+              "in_reply_to",
+              "labels",
+              "status"
+            ],
+            "type": "object"
+          },
+          {
+            "additionalProperties": false,
+            "properties": {
+              "created_at": {
+                "description": "Absolute ISO 8601 service timestamp in UTC (Z), with millisecond precision.",
+                "type": "string"
+              },
+              "error_code": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "guidance": {
+                "type": "string"
+              },
+              "id": {
+                "type": "string"
+              },
+              "in_reply_to": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "inbox_id": {
+                "type": "string"
+              },
+              "labels": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "recipient_count": {
+                "maximum": 9007199254740991,
+                "minimum": 0,
+                "type": "integer"
+              },
+              "status": {
+                "enum": [
+                  "rejected",
+                  "unknown"
+                ],
+                "type": "string"
+              },
+              "thread_id": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "id",
+              "inbox_id",
+              "thread_id",
+              "created_at",
+              "recipient_count",
+              "error_code",
+              "in_reply_to",
+              "labels",
+              "status",
+              "guidance"
+            ],
+            "type": "object"
+          }
+        ],
+        "description": "The saved send. Check status: a successful call can still return rejected or unknown."
+      },
+      "outcome_persisted": {
+        "const": false,
+        "type": "boolean"
+      },
+      "replayed": {
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "limited",
+      "message",
+      "outcome_persisted",
+      "guidance"
+    ],
+    "type": "object"
+  }
+]
  2. First observed

TDQS

A3.5/5.0
Behavior3/5

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

Annotations already declare destructiveHint=true, openWorldHint=true, and idempotentHint=false, so the safety profile is largely covered. The description adds the reply-mode behavior, but it never warns that sending is irreversible or quota-consuming, nor does it reconcile the schema's idempotency_key parameter with the idempotentHint=false annotation.

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?

It is a single compact sentence with no filler, and the two operating modes are front-loaded. The phrasing ('recipients the assignment authorizes') is dense and slightly awkward, costing it the top mark.

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?

An output schema exists, so return values need not be explained, and annotations carry the safety profile. For an 11-parameter tool the description covers the core two-mode behavior adequately, though it is silent on attachments, html/text alternatives, and quota implications.

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 description coverage is 82%, so the schema already documents to/cc/bcc, attachments, labels, and idempotency_key in detail. The description's only parameter-level contribution is the in_reply_to semantics, which the schema already states; nothing new is added beyond that baseline.

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?

The description states a specific verb (send) and resource (email) and distinguishes two modes: a fresh send to author-authorized recipients, and a reply when in_reply_to is supplied. It does not, however, differentiate itself from closely related siblings such as reply_message, reply_all_message, or send_draft.

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?

It gives one real routing rule — supply in_reply_to to send a reply rather than a new message — which is useful conditional guidance. It says nothing about when to prefer this tool over reply_message, reply_all_message, forward_message, or send_draft, all of which are siblings that overlap heavily.

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

All Cherami toolsInspect
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.

Resources