Fluxmail Cloud

List emails

list_emails

Read-only

List or search emails in a mailbox, with metadata and optional previews. Filter by folder, sender, read state, dates and more, and paginate with pageToken.

Input Schema

Name	Required	Description
`to`	No
`from`	No
`read`	No
`text`	No	Literal full-text search terms
`after`	No	YYYY-MM-DD received date, inclusive in UTC
`before`	No	YYYY-MM-DD received date, exclusive in UTC
`folder`	No	Folder role (inbox, sent, drafts, trash, spam, starred, archive, all) or a label/folder name. Use all or omit this field to search all mail except Spam and Trash. An IMAP server's \All mailbox may use different rules.
`starred`	No
`subject`	No
`pageSize`	No	Defaults to 25
`accountId`	No	Account to operate on. Optional when exactly one account is connected.
`pageToken`	No	nextPageToken from a previous call
`hasAttachment`	No
`includeSnippet`	No	Request or suppress message previews
`rawProviderQuery`	No	Provider-native Gmail syntax or Outlook KQL for one compatible account
`includeSearchContext`	No	Include a match-centered body excerpt; requires a portable text query

Output Schema

Name	Required	Description	Default
`data`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 31, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": false,
+  "properties": {
+    "data": {
+      "additionalProperties": true,
+      "properties": {
+        "exhausted": {
+          "type": "boolean"
+        },
+        "items": {
+          "items": {
+            "additionalProperties": true,
+            "properties": {
+              "accountId": {
+                "type": "string"
+              },
+              "attachments": {
+                "items": {
+                  "additionalProperties": true,
+                  "properties": {
+                    "filename": {
+                      "type": "string"
+                    },
+                    "id": {
+                      "type": "string"
+                    },
+                    "mimeType": {
+                      "type": "string"
+                    },
+                    "sizeBytes": {
+                      "type": "number"
+                    }
+                  },
+                  "required": [
+                    "id",
+                    "filename",
+                    "mimeType",
+                    "sizeBytes"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "body": {
+                "additionalProperties": false,
+                "properties": {
+                  "html": {
+                    "type": "string"
+                  },
+                  "text": {
+                    "type": "string"
+                  }
+                },
+                "type": "object"
+              },
+              "bodyTruncation": {
+                "additionalProperties": {
+                  "additionalProperties": false,
+                  "properties": {
+                    "nextOffset": {
+                      "type": "number"
+                    },
+                    "totalChars": {
+                      "type": "number"
+                    }
+                  },
+                  "required": [
+                    "totalChars"
+                  ],
+                  "type": "object"
+                },
+                "type": "object"
+              },
+              "date": {
+                "type": "string"
+              },
+              "flags": {
+                "additionalProperties": true,
+                "properties": {
+                  "draft": {
+                    "type": "boolean"
+                  },
+                  "read": {
+                    "type": "boolean"
+                  },
+                  "starred": {
+                    "type": "boolean"
+                  }
+                },
+                "required": [
+                  "read",
+                  "starred",
+                  "draft"
+                ],
+                "type": "object"
+              },
+              "id": {
+                "type": "string"
+              },
+              "subject": {
+                "type": "string"
+              },
+              "threadId": {
+                "type": "string"
+              },
+              "to": {
+                "items": {
+                  "additionalProperties": true,
+                  "properties": {
+                    "email": {
+                      "type": "string"
+                    },
+                    "name": {
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "email"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              }
+            },
+            "required": [
+              "id",
+              "threadId",
+              "accountId",
+              "to",
+              "subject",
+              "date",
+              "flags"
+            ],
+            "type": "object"
+          },
+          "type": "array"
+        },
+        "nextPageToken": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "items",
+        "exhausted"
+      ],
+      "type": "object"
+    }
+  },
+  "required": [
+    "data"
+  ],
+  "type": "object"
+}

Changed14 schema fields changedOct 29, 2026

changedInput schema / properties / accountId / anyOf

Previous value: -[
-  {
-    "minLength": 1,
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "maxLength": 512,
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

changedInput schema / properties / after / anyOf

Previous value: -[
-  {
-    "minLength": 1,
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

changedInput schema / properties / before / anyOf

Previous value: -[
-  {
-    "minLength": 1,
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "pattern": "^\\d{4}-\\d{2}-\\d{2}$",
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

changedInput schema / properties / folder / anyOf

Previous value: -[
-  {
-    "minLength": 1,
-    "type": "string"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "maxLength": 2048,
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / from / anyOf

Added value: +[
+  {
+    "maxLength": 2048,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedInput schema / properties / from / type

Removed value: -[
-  "string",
-  "null"
-]

addedInput schema / properties / rawProviderQuery / anyOf

Added value: +[
+  {
+    "maxLength": 2048,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedInput schema / properties / rawProviderQuery / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedInput schema / properties / subject / anyOf

Added value: +[
+  {
+    "maxLength": 2048,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedInput schema / properties / subject / type
```
Removed value: -[
-  "string",
-  "null"
-]
```

addedInput schema / properties / text / anyOf

Added value: +[
+  {
+    "maxLength": 2048,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedInput schema / properties / text / type

Removed value: -[
-  "string",
-  "null"
-]

addedInput schema / properties / to / anyOf

Added value: +[
+  {
+    "maxLength": 2048,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

removedInput schema / properties / to / type

Removed value: -[
-  "string",
-  "null"
-]

Changed49 schema fields changedOct 27, 2026

changedInput schema / $schema

Previous value: -"https://json-schema.org/draft/2020-12/schema"New value: +"http://json-schema.org/draft-07/schema#"

addedInput schema / properties / accountId / anyOf

Added value: +[
+  {
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / accountId / description

Added value: +"Account to operate on. Optional when exactly one account is connected."

removedInput schema / properties / accountId / maxLength
```
Removed value: -512
```
removedInput schema / properties / accountId / minLength
```
Removed value: -1
```
removedInput schema / properties / accountId / type
```
Removed value: -"string"
```

addedInput schema / properties / after / anyOf

Added value: +[
+  {
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / after / description

Added value: +"YYYY-MM-DD received date, inclusive in UTC"

removedInput schema / properties / after / format
```
Removed value: -"date"
```

removedInput schema / properties / after / pattern

Removed value: -"^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))$"

removedInput schema / properties / after / type
```
Removed value: -"string"
```

addedInput schema / properties / before / anyOf

Added value: +[
+  {
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / before / description

Added value: +"YYYY-MM-DD received date, exclusive in UTC"

removedInput schema / properties / before / format
```
Removed value: -"date"
```

removedInput schema / properties / before / pattern

Removed value: -"^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))$"

removedInput schema / properties / before / type
```
Removed value: -"string"
```

addedInput schema / properties / folder / anyOf

Added value: +[
+  {
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / folder / description

Added value: +"Folder role (inbox, sent, drafts, trash, spam, starred, archive, all) or a label/folder name. Use all or omit this field to search all mail except Spam and Trash. An IMAP server's \\All mailbox may use different rules."

removedInput schema / properties / folder / maxLength
```
Removed value: -2048
```
removedInput schema / properties / folder / type
```
Removed value: -"string"
```
removedInput schema / properties / from / maxLength
```
Removed value: -2048
```

changedInput schema / properties / from / type

Previous value: -"string"New value: +[
+  "string",
+  "null"
+]

changedInput schema / properties / hasAttachment / type

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

addedInput schema / properties / includeSearchContext / description

Added value: +"Include a match-centered body excerpt; requires a portable text query"

changedInput schema / properties / includeSearchContext / type

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

addedInput schema / properties / includeSnippet / description
```
Added value: +"Request or suppress message previews"
```

changedInput schema / properties / includeSnippet / type

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

addedInput schema / properties / pageSize / anyOf

Added value: +[
+  {
+    "maximum": 100,
+    "minimum": 1,
+    "type": "integer"
+  },
+  {
+    "type": "null"
+  }
+]

removedInput schema / properties / pageSize / default
```
Removed value: -25
```
addedInput schema / properties / pageSize / description
```
Added value: +"Defaults to 25"
```
removedInput schema / properties / pageSize / maximum
```
Removed value: -100
```
removedInput schema / properties / pageSize / minimum
```
Removed value: -1
```
removedInput schema / properties / pageSize / type
```
Removed value: -"integer"
```

addedInput schema / properties / pageToken / anyOf

Added value: +[
+  {
+    "minLength": 1,
+    "type": "string"
+  },
+  {
+    "type": "null"
+  }
+]

addedInput schema / properties / pageToken / description
```
Added value: +"nextPageToken from a previous call"
```
removedInput schema / properties / pageToken / minLength
```
Removed value: -1
```
removedInput schema / properties / pageToken / type
```
Removed value: -"string"
```

addedInput schema / properties / rawProviderQuery / description

Added value: +"Provider-native Gmail syntax or Outlook KQL for one compatible account"

removedInput schema / properties / rawProviderQuery / maxLength
```
Removed value: -2048
```

changedInput schema / properties / rawProviderQuery / type

Previous value: -"string"New value: +[
+  "string",
+  "null"
+]

changedInput schema / properties / read / type

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

changedInput schema / properties / starred / type

Previous value: -"boolean"New value: +[
+  "boolean",
+  "null"
+]

removedInput schema / properties / subject / maxLength
```
Removed value: -2048
```

changedInput schema / properties / subject / type

Previous value: -"string"New value: +[
+  "string",
+  "null"
+]

addedInput schema / properties / text / description
```
Added value: +"Literal full-text search terms"
```
removedInput schema / properties / text / maxLength
```
Removed value: -2048
```

changedInput schema / properties / text / type

Previous value: -"string"New value: +[
+  "string",
+  "null"
+]

removedInput schema / properties / to / maxLength
```
Removed value: -2048
```

changedInput schema / properties / to / type

Previous value: -"string"New value: +[
+  "string",
+  "null"
+]

Changed1 schema field changedOct 25, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Changed1 schema field changedOct 23, 2026
- removedInput schema / properties / pageToken / maxLength
```
Removed value: -512
```
First observedOct 15, 2026

TDQS

A3.6/5.0

Behavior4/5

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

Annotations already establish readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the bar is lower. The description still adds useful behavior: results carry metadata, previews are opt-in, and paging is done via pageToken from a prior call — details not fully spelled out in the annotations. It stops short of stating ordering, result limits, or default mail-scope behavior.

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?

Two sentences, no filler, and the core capability is front-loaded before the filtering mechanics. Slightly terse for a 16-parameter tool, but nothing is wasted.

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 and annotations cover safety, so the description needn't explain returns. But for a 16-parameter tool with provider-specific escape hatches (rawProviderQuery, includeSearchContext requiring a text query, accountId behavior), the description omits any mention of these interactions or the default all-mail scope, leaving the agent to read the schema closely.

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?

With 63% schema coverage across 16 parameters, the schema documents the tricky ones (folder defaults, date semantics, pageSize default, rawProviderQuery syntax). The description only summarizes filter families ('folder, sender, read state, dates and more') without adding meaning beyond the schema, so the baseline 3 applies.

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?

States a specific verb and resource ('List or search emails in a mailbox') plus the scope of returned data ('metadata and optional previews'), so the operation is clear. However, it lumps 'list' and 'search' together without distinguishing this tool from the sibling search_emails / search_emails_batch, which is the main ambiguity an agent faces here.

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 filter/pagination mechanics imply the use case (browse or narrow down a mailbox), but there is no explicit when-to-use versus search_emails, search_emails_batch, or get_email. The agent must infer the choice from the tool name alone, which is the weakest part of an otherwise clear definition.

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

All Fluxmail Cloud 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.

Resources

Need Help?