campaignstack

campaignstack_estimate_cost

Read-onlyIdempotent

What a costed final MCP tool would spend, before you call it. Returns creditsPerUnit, the total for the count you name, the workspace's remaining free balance, and whether the spend is allowed. It only calculates, never reserves or spends. A paid workspace overflows to overage in its subscription currency (USD or EUR). The response includes the current overageRate and currency from billing. It reports a null balance rather than a refusal. Prices come from the same table the charge is made from, so single-action tools cannot drift from billing. For tools with multiple charge modes, pass variant for one mode or variantCounts for the full exposure; otherwise the tool refuses to guess.

Input Schema

Name	Required	Description
`tool`	Yes	A costed final tool name, e.g. campaignstack_craft_message. Known costed tools: campaignstack_analyze_company_website, campaignstack_answer_job_question, campaignstack_apply_to_job, campaignstack_comment_on_post, campaignstack_craft_message, campaignstack_decide_review, campaignstack_discover_lead_magnets, campaignstack_enrich_leads, campaignstack_explain_draft, campaignstack_export_seo_report, campaignstack_follow_profile, campaignstack_get_lead_comments, campaignstack_like_post, campaignstack_refresh_companies, campaignstack_refresh_identity_voice, campaignstack_refresh_workspace_playbook, campaignstack_run_seo_audit, campaignstack_send_connection_request, campaignstack_send_email, campaignstack_send_inmail, campaignstack_send_message.
`count`	No	How many units you are about to spend for a single-cost tool or one selected variant. What a unit IS depends on the tool (a call, a result found, a page read); the response repeats it as `per`. Default 1.
`variant`	No	For multi-cost tools, estimate one variant by name (for example email, phone, audit, probe, serp).
`workspaceId`	No	Workspace ID. Omit it when this connection reaches one workspace: a workspace key (cs_) is bound to its own, and a user key (csu_) or connected app whose person belongs to exactly one workspace defaults to that one. Required only when the person belongs to several; the error then lists them, and campaignstack_whoami reports them too.
`variantCounts`	No	For multi-cost tools, estimate multiple variants at once. Keys are variant names and values are unit counts, e.g. {audit:1, probe:30, serp:10}.

Output Schema

Name	Required	Description	Default
`per`	No
`note`	No
`tool`	No
`count`	No
`label`	No
`total`	No
`isPaid`	No
`allowed`	No
`balance`	No
`variant`	No
`currency`	No
`variants`	No
`actionType`	No
`overageRate`	No
`creditsPerUnit`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 27, 2026

changedInput schema / properties / tool / description

Previous value: -"A costed final tool name, e.g. campaignstack_craft_message. Known costed tools: campaignstack_analyze_company_website, campaignstack_answer_job_question, campaignstack_apply_to_job, campaignstack_comment_on_post, campaignstack_craft_message, campaignstack_decide_review, campaignstack_discover_lead_magnets, campaignstack_enrich_leads, campaignstack_explain_draft, campaignstack_export_seo_report, campaignstack_follow_profile, campaignstack_get_lead_comments, campaignstack_like_post, campaignstack_prepare_meeting_brief, campaignstack_refresh_companies, campaignstack_refresh_identity_voice, campaignstack_refresh_workspace_playbook, campaignstack_run_seo_audit, campaignstack_send_connection_request, campaignstack_send_email, campaignstack_send_inmail, campaignstack_send_message."New value: +"A costed final tool name, e.g. campaignstack_craft_message. Known costed tools: campaignstack_analyze_company_website, campaignstack_answer_job_question, campaignstack_apply_to_job, campaignstack_comment_on_post, campaignstack_craft_message, campaignstack_decide_review, campaignstack_discover_lead_magnets, campaignstack_enrich_leads, campaignstack_explain_draft, campaignstack_export_seo_report, campaignstack_follow_profile, campaignstack_get_lead_comments, campaignstack_like_post, campaignstack_refresh_companies, campaignstack_refresh_identity_voice, campaignstack_refresh_workspace_playbook, campaignstack_run_seo_audit, campaignstack_send_connection_request, campaignstack_send_email, campaignstack_send_inmail, campaignstack_send_message."

Changed3 schema fields changedOct 16, 2026

addedOutput schema / properties / currency

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "not": {}
+        },
+        {
+          "enum": [
+            "usd",
+            "eur"
+          ],
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / overageRate

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "not": {}
+        },
+        {
+          "type": "number"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

changedOutput schema / properties / variants / anyOf

Previous value: -[
-  {
-    "anyOf": [
-      {
-        "not": {}
-      },
-      {
-        "items": {
-          "additionalProperties": false,
-          "properties": {
-            "actionType": {
-              "type": "string"
-            },
-            "allowed": {
-              "type": "boolean"
-            },
-            "balance": {
-              "type": [
-                "number",
-                "null"
-              ]
-            },
-            "count": {
-              "type": "number"
-            },
-            "creditsPerUnit": {
-              "type": "number"
-            },
-            "isPaid": {
-              "type": "boolean"
-            },
-            "label": {
-              "type": "string"
-            },
-            "note": {
-              "type": "string"
-            },
-            "per": {
-              "type": "string"
-            },
-            "total": {
-              "type": "number"
-            },
-            "variant": {
-              "type": "string"
-            }
-          },
-          "type": "object"
-        },
-        "type": "array"
-      }
-    ]
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "anyOf": [
+      {
+        "not": {}
+      },
+      {
+        "items": {
+          "additionalProperties": false,
+          "properties": {
+            "actionType": {
+              "type": "string"
+            },
+            "allowed": {
+              "type": "boolean"
+            },
+            "balance": {
+              "type": [
+                "number",
+                "null"
+              ]
+            },
+            "count": {
+              "type": "number"
+            },
+            "creditsPerUnit": {
+              "type": "number"
+            },
+            "currency": {
+              "enum": [
+                "usd",
+                "eur"
+              ],
+              "type": "string"
+            },
+            "isPaid": {
+              "type": "boolean"
+            },
+            "label": {
+              "type": "string"
+            },
+            "note": {
+              "type": "string"
+            },
+            "overageRate": {
+              "type": "number"
+            },
+            "per": {
+              "type": "string"
+            },
+            "total": {
+              "type": "number"
+            },
+            "variant": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "type": "array"
+      }
+    ]
+  },
+  {
+    "type": "null"
+  }
+]

Changed1 schema field changedSep 29, 2026

changedInput schema / properties / workspaceId / description

Previous value: -"Workspace ID. REQUIRED for a user key (csu_), which spans every workspace you belong to; omitted for a workspace key (cs_), which is bound to one and ignores this argument. campaignstack_whoami reports which kind of key you are holding and, for a user key, the workspaces it can reach."New value: +"Workspace ID. Omit it when this connection reaches one workspace: a workspace key (cs_) is bound to its own, and a user key (csu_) or connected app whose person belongs to exactly one workspace defaults to that one. Required only when the person belongs to several; the error then lists them, and campaignstack_whoami reports them too."

Changed7 schema fields changedSep 26, 2026

changedInput schema / properties / count / description

Previous value: -"How many units you are about to spend. What a unit IS depends on the tool (a call, a result found, a page read); the response repeats it as `per`. Default 1."New value: +"How many units you are about to spend for a single-cost tool or one selected variant. What a unit IS depends on the tool (a call, a result found, a page read); the response repeats it as `per`. Default 1."

changedInput schema / properties / tool / description

Previous value: -"A costed tool name, e.g. campaignstack_craft_message. Known costed tools: campaignstack_analyze_website, campaignstack_answer_job_question, campaignstack_apply_to_job, campaignstack_check_company_news, campaignstack_comment_on_post, campaignstack_craft_comment, campaignstack_craft_followup, campaignstack_craft_message, campaignstack_craft_note, campaignstack_discover_lead_magnets, campaignstack_draft_meeting_message, campaignstack_enrich_lead_contact_info, campaignstack_explain_draft, campaignstack_extract_conversation_voice, campaignstack_extract_recent_comments, campaignstack_follow_profile, campaignstack_like_post, campaignstack_refresh_company, campaignstack_regenerate_playbook, campaignstack_reply_to_comment, campaignstack_request_meeting_brief, campaignstack_reread_review_link, campaignstack_send_connection_request, campaignstack_send_gmail, campaignstack_send_inmail, campaignstack_send_message, campaignstack_seo_run_audit."New value: +"A costed final tool name, e.g. campaignstack_craft_message. Known costed tools: campaignstack_analyze_company_website, campaignstack_answer_job_question, campaignstack_apply_to_job, campaignstack_comment_on_post, campaignstack_craft_message, campaignstack_decide_review, campaignstack_discover_lead_magnets, campaignstack_enrich_leads, campaignstack_explain_draft, campaignstack_export_seo_report, campaignstack_follow_profile, campaignstack_get_lead_comments, campaignstack_like_post, campaignstack_prepare_meeting_brief, campaignstack_refresh_companies, campaignstack_refresh_identity_voice, campaignstack_refresh_workspace_playbook, campaignstack_run_seo_audit, campaignstack_send_connection_request, campaignstack_send_email, campaignstack_send_inmail, campaignstack_send_message."

addedInput schema / properties / variant

Added value: +{
+  "description": "For multi-cost tools, estimate one variant by name (for example email, phone, audit, probe, serp).",
+  "minLength": 1,
+  "type": "string"
+}

addedInput schema / properties / variantCounts

Added value: +{
+  "additionalProperties": {
+    "maximum": 100000,
+    "minimum": 1,
+    "type": "integer"
+  },
+  "description": "For multi-cost tools, estimate multiple variants at once. Keys are variant names and values are unit counts, e.g. {audit:1, probe:30, serp:10}.",
+  "type": "object"
+}

addedOutput schema / properties / label

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "not": {}
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / variant

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "not": {}
+        },
+        {
+          "type": "string"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

addedOutput schema / properties / variants

Added value: +{
+  "anyOf": [
+    {
+      "anyOf": [
+        {
+          "not": {}
+        },
+        {
+          "items": {
+            "additionalProperties": false,
+            "properties": {
+              "actionType": {
+                "type": "string"
+              },
+              "allowed": {
+                "type": "boolean"
+              },
+              "balance": {
+                "type": [
+                  "number",
+                  "null"
+                ]
+              },
+              "count": {
+                "type": "number"
+              },
+              "creditsPerUnit": {
+                "type": "number"
+              },
+              "isPaid": {
+                "type": "boolean"
+              },
+              "label": {
+                "type": "string"
+              },
+              "note": {
+                "type": "string"
+              },
+              "per": {
+                "type": "string"
+              },
+              "total": {
+                "type": "number"
+              },
+              "variant": {
+                "type": "string"
+              }
+            },
+            "type": "object"
+          },
+          "type": "array"
+        }
+      ]
+    },
+    {
+      "type": "null"
+    }
+  ]
+}

Changed1 schema field changedSep 25, 2026

changedInput schema / properties / tool / description

Previous value: -"A costed tool name, e.g. campaignstack_craft_message. Known costed tools: campaignstack_analyze_website, campaignstack_check_company_news, campaignstack_comment_on_post, campaignstack_craft_comment, campaignstack_craft_followup, campaignstack_craft_message, campaignstack_craft_note, campaignstack_discover_lead_magnets, campaignstack_draft_meeting_message, campaignstack_enrich_lead_contact_info, campaignstack_explain_draft, campaignstack_extract_conversation_voice, campaignstack_extract_recent_comments, campaignstack_follow_profile, campaignstack_like_post, campaignstack_refresh_company, campaignstack_regenerate_playbook, campaignstack_reply_to_comment, campaignstack_request_meeting_brief, campaignstack_reread_review_link, campaignstack_send_connection_request, campaignstack_send_gmail, campaignstack_send_inmail, campaignstack_send_message, campaignstack_seo_run_audit."New value: +"A costed tool name, e.g. campaignstack_craft_message. Known costed tools: campaignstack_analyze_website, campaignstack_answer_job_question, campaignstack_apply_to_job, campaignstack_check_company_news, campaignstack_comment_on_post, campaignstack_craft_comment, campaignstack_craft_followup, campaignstack_craft_message, campaignstack_craft_note, campaignstack_discover_lead_magnets, campaignstack_draft_meeting_message, campaignstack_enrich_lead_contact_info, campaignstack_explain_draft, campaignstack_extract_conversation_voice, campaignstack_extract_recent_comments, campaignstack_follow_profile, campaignstack_like_post, campaignstack_refresh_company, campaignstack_regenerate_playbook, campaignstack_reply_to_comment, campaignstack_request_meeting_brief, campaignstack_reread_review_link, campaignstack_send_connection_request, campaignstack_send_gmail, campaignstack_send_inmail, campaignstack_send_message, campaignstack_seo_run_audit."

Changed1 schema field changedSep 20, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": true,
+  "properties": {
+    "actionType": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "string"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "allowed": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "boolean"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "balance": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": [
+                "number",
+                "null"
+              ]
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "count": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "number"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "creditsPerUnit": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "number"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "isPaid": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "boolean"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "note": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "string"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "per": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "string"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "tool": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "string"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "total": {
+      "anyOf": [
+        {
+          "anyOf": [
+            {
+              "not": {}
+            },
+            {
+              "type": "number"
+            }
+          ]
+        },
+        {
+          "type": "null"
+        }
+      ]
+    }
+  },
+  "type": "object"
+}

AddedSep 13, 2026

TDQS

A4.5/5.0

Behavior5/5

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

Annotations already declare readOnly/idempotent/non-destructive, yet the description still adds real substance: it never reserves or spends, it reports a null balance instead of refusing, overage and currency behavior are explained, and prices come from the same table as the actual charge. It also discloses the refusal mode for ambiguous multi-mode calls.

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?

Front-loaded with what it returns, then the safety and pricing guarantees, then the parameter rule. Seven sentences is dense, and a couple (currency/overage rate) lean toward output-schema detail, but every sentence carries actionable information.

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 restating creditsPerUnit, total, balance and allowed is largely redundant, though harmless. Nothing an agent needs to call this correctly is missing: input semantics, refusal behavior, and workspace resolution are all covered either here or in the schema.

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

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3, but the description adds meaning beyond the schema by framing variant versus variantCounts as one-mode versus full-exposure and warning that omitting both causes a refusal. It does not spell out mutual exclusivity or how `count` interacts with variant selection.

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?

States a specific verb and resource: it estimates what a named costed tool would spend, and it distinguishes itself immediately from every sibling, none of which price anything. The opening line tells an agent exactly what the tool returns before it opens the schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

"before you call it" establishes the pre-flight use case, and the closing sentence gives a concrete directive for multi-mode tools (pass variant or variantCounts; the tool refuses to guess). It never names an alternative or an explicit when-not, but for a read-only cost estimator with no competing sibling that gap is small.

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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