Summer

Add a teammate

summer_teammates_create

Add a teammate. A managed teammate gets first.last@gosummer.ai, unique across Summer. A company-managed teammate uses the company's own address. Invites no one, joins no Slack workspace and sends nothing.

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": {
      "company": "<company>",
      "request": "<request>"
    },
    "name": "summer_teammates_create"
  }
}

Input Schema

Name	Required	Description
`company`	Yes
`request`	Yes
`idempotency_key`	No	Reuse the same key when retrying the same change

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 23, 2026

changedInput schema / properties / request / oneOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "description": "Summer gives the teammate first.last@gosummer.ai and keeps its mailbox.",
-    "properties": {
-      "avatar_url": {
-        "anyOf": [
-          {
-            "description": "Public https image link for the teammate's photo.",
-            "maxLength": 500,
-            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "first_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "managed",
-        "type": "string"
-      },
-      "last_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "reason": {
-        "maxLength": 1000,
-        "minLength": 1,
-        "type": "string"
-      },
-      "use_suggested_photo": {
-        "description": "For a name from teammates.names.list: give the teammate that name's suggested photo. Summer stores it like an upload, so it also becomes the Slack photo when Slack is connected. Ignores avatar_url.",
-        "type": "boolean"
-      }
-    },
-    "required": [
-      "kind",
-      "first_name",
-      "last_name",
-      "reason"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "The company manages the email and Slack account and connects Slack to Summer.",
-    "properties": {
-      "avatar_url": {
-        "anyOf": [
-          {
-            "description": "Public https image link for the teammate's photo.",
-            "maxLength": 500,
-            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "email_address": {
-        "description": "The company's own address for this teammate. Summer never reads this mailbox.",
-        "format": "email",
-        "maxLength": 254,
-        "pattern": "^(?:[A-Za-z0-9_'+\\-]+\\.)*[A-Za-z0-9_'+\\-]*[A-Za-z0-9_+-]@(?:[A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$",
-        "type": "string"
-      },
-      "first_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "company",
-        "type": "string"
-      },
-      "last_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "reason": {
-        "maxLength": 1000,
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "first_name",
-      "last_name",
-      "email_address",
-      "reason"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "description": "Summer gives the teammate first.last@gosummer.ai and keeps its mailbox.",
+    "properties": {
+      "avatar_url": {
+        "anyOf": [
+          {
+            "description": "Public https image link for the teammate's photo.",
+            "maxLength": 500,
+            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "first_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "managed",
+        "type": "string"
+      },
+      "last_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "reason": {
+        "maxLength": 1000,
+        "minLength": 1,
+        "type": "string"
+      },
+      "use_suggested_photo": {
+        "description": "For a name from teammates.names.list: give the teammate that name's suggested photo. Summer stores it like an upload, so it also becomes the Slack photo when Slack is connected. Ignores avatar_url.",
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "kind",
+      "first_name",
+      "last_name",
+      "reason"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "The company manages the email and Slack account and connects Slack to Summer.",
+    "properties": {
+      "avatar_url": {
+        "anyOf": [
+          {
+            "description": "Public https image link for the teammate's photo.",
+            "maxLength": 500,
+            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "email_address": {
+        "description": "The company's own address for this teammate. Summer never reads this mailbox.",
+        "format": "email",
+        "maxLength": 254,
+        "pattern": "^(?:[A-Za-z0-9_'+\\-]+\\.)*[A-Za-z0-9_'+\\-]*[A-Za-z0-9_+-]@(?:[A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$",
+        "type": "string"
+      },
+      "first_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "company",
+        "type": "string"
+      },
+      "last_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "reason": {
+        "maxLength": 1000,
+        "minLength": 1,
+        "type": "string"
+      },
+      "use_suggested_photo": {
+        "description": "For a name from teammates.names.list: give the teammate that name's suggested photo with the company's own address. Ignores avatar_url.",
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "kind",
+      "first_name",
+      "last_name",
+      "email_address",
+      "reason"
+    ],
+    "type": "object"
+  }
+]

Changed1 schema field changedOct 23, 2026

changedInput schema / properties / request / oneOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "description": "Summer gives the teammate first.last@gosummer.ai and keeps its mailbox.",
-    "properties": {
-      "avatar_url": {
-        "anyOf": [
-          {
-            "description": "Public https image link for the teammate's photo.",
-            "maxLength": 500,
-            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "first_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "managed",
-        "type": "string"
-      },
-      "last_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "reason": {
-        "maxLength": 1000,
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "first_name",
-      "last_name",
-      "reason"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "description": "The company manages the email and Slack account and connects Slack to Summer.",
-    "properties": {
-      "avatar_url": {
-        "anyOf": [
-          {
-            "description": "Public https image link for the teammate's photo.",
-            "maxLength": 500,
-            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "email_address": {
-        "description": "The company's own address for this teammate. Summer never reads this mailbox.",
-        "format": "email",
-        "maxLength": 254,
-        "pattern": "^(?:[A-Za-z0-9_'+\\-]+\\.)*[A-Za-z0-9_'+\\-]*[A-Za-z0-9_+-]@(?:[A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$",
-        "type": "string"
-      },
-      "first_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "kind": {
-        "const": "company",
-        "type": "string"
-      },
-      "last_name": {
-        "maxLength": 30,
-        "minLength": 1,
-        "type": "string"
-      },
-      "reason": {
-        "maxLength": 1000,
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "kind",
-      "first_name",
-      "last_name",
-      "email_address",
-      "reason"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "description": "Summer gives the teammate first.last@gosummer.ai and keeps its mailbox.",
+    "properties": {
+      "avatar_url": {
+        "anyOf": [
+          {
+            "description": "Public https image link for the teammate's photo.",
+            "maxLength": 500,
+            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "first_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "managed",
+        "type": "string"
+      },
+      "last_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "reason": {
+        "maxLength": 1000,
+        "minLength": 1,
+        "type": "string"
+      },
+      "use_suggested_photo": {
+        "description": "For a name from teammates.names.list: give the teammate that name's suggested photo. Summer stores it like an upload, so it also becomes the Slack photo when Slack is connected. Ignores avatar_url.",
+        "type": "boolean"
+      }
+    },
+    "required": [
+      "kind",
+      "first_name",
+      "last_name",
+      "reason"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "description": "The company manages the email and Slack account and connects Slack to Summer.",
+    "properties": {
+      "avatar_url": {
+        "anyOf": [
+          {
+            "description": "Public https image link for the teammate's photo.",
+            "maxLength": 500,
+            "pattern": "^https:\\/\\/[^\\s<>\"]+$",
+            "type": "string"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "email_address": {
+        "description": "The company's own address for this teammate. Summer never reads this mailbox.",
+        "format": "email",
+        "maxLength": 254,
+        "pattern": "^(?:[A-Za-z0-9_'+\\-]+\\.)*[A-Za-z0-9_'+\\-]*[A-Za-z0-9_+-]@(?:[A-Za-z0-9][A-Za-z0-9\\-]*\\.)+[A-Za-z]{2,}$",
+        "type": "string"
+      },
+      "first_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "kind": {
+        "const": "company",
+        "type": "string"
+      },
+      "last_name": {
+        "maxLength": 30,
+        "minLength": 1,
+        "type": "string"
+      },
+      "reason": {
+        "maxLength": 1000,
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "kind",
+      "first_name",
+      "last_name",
+      "email_address",
+      "reason"
+    ],
+    "type": "object"
+  }
+]

AddedOct 23, 2026

TDQS

A4/5.0

Behavior4/5

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

Annotations already declare this is a non-read-only, non-destructive, open-world operation. The description adds valuable behavior beyond annotations: managed teammates receive a unique first.last@gosummer.ai address, company-managed teammates use the company address, and the operation sends no invites, joins no Slack workspace, and sends nothing.

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?

Four short sentences, front-loaded with the action and variant distinction, then side-effect constraints. Every sentence adds useful information with no repetition or filler.

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?

For a nested, mutation-oriented creation tool with no output schema, the description covers the key variant behavior and no-op side effects well. It still does not describe what the successful response contains or any authorization constraints, which would help an agent fully understand the call.

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 low at 33%, so the description should compensate. It meaningfully explains the 'managed'/'company' request variants and email semantics, but it does not clarify the required 'company' UUID or the required 'reason' field, leaving gaps for an agent to infer from the schema.

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 ('Add a teammate') and distinguishes the two creation modes by their email behavior. An agent can tell this creates a teammate rather than updating, listing, or configuring one.

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 clearly explains the managed versus company-managed variant conditions, which guides choice of request kind. However, it does not explicitly say when to use this tool versus siblings like summer_teammates_update or summer_teammates_list, nor does it state prerequisites.

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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