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List connector mappings

well_list_connector_mappings
Read-only

List how one connected tool's data maps into Well: one row per Well record type (target_model, such as transactions or invoices) and provider tool (tool_name), with the JSONata expression that turns that tool's response into that record type and whether the mapping waits to be drawn again (needs_regeneration). A record type that several provider tools feed returns one row per tool.

Use it to answer "how does my Pennylane connection map its invoices?" or "why are this tool's invoices missing a field?". Pass the workspace_connector_id from well_list_connectors. Only a connection mapped by a drawn expression has mappings: an empty list means the connection is not mapped this way, never that it brings no data in. It reads the mappings and changes nothing: it starts no sync and draws no mapping. truncated says the list was cut at its bound.

When the token authorizes one workspace, call this directly — no workspace call is needed first. When it authorizes several, this read will not guess which one you mean: pass workspace_id on the call.

Input Schema

NameRequiredDescriptionDefault
workspace_idNoTarget workspace. Omit when the token authorizes one workspace. Required when it authorizes several: this read reports one workspace's own figures and will not choose which.
conversation_idNoThe conversation id returned by the previous Well result, in its meta under well/conversation_id, in its structuredContent, or in its JSON text block. Pass it back on every call in the same conversation, including a call a card makes, so the chosen workspace and the earlier answers still apply. It decides the conversation on its own: nothing the host states about the session replaces it. Omit it only on the first call of a conversation.
workspace_scopeNoRestrict this call to the family: the token's primary workspace plus the company workspaces under it that you are a member of. Unrelated authorized workspaces drop out of the read; row reads merge across the family, while a per-workspace figure still reports exactly one workspace.
workspace_connector_idYesThe workspace_connector_id of the connected tool, from well_list_connectors.

Output Schema

NameRequiredDescriptionDefault
errorNo
successYes
mappingsNo
truncatedNo
conversation_idNoThe conversation this result belongs to. Pass it back as the conversation_id argument on every later Well call in the same conversation.
newly_connectedNoTools that connected to this workspace since the last result and that no session was told about yet, oldest first. Present only when at least one tool is new. The connected-line rule says when to tell an entry; when it does, one line per entry, in the person's language: "<name> is connected.". Never fold several entries into one sentence. Each entry comes back once, on one result only: never repeat its line later.
resolved_workspaceNoThe workspace that answered, when the caller named none and the token authorizes several.
conversation_id_noteNoPresent only when the server opened a fresh lane, stating that no choice recorded earlier was read.
conversation_id_sourceNoWhere the conversation id came from: the host's own request meta, the caller's argument, or a fresh lane the server opened.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed6 schema fields changed
    • removedOutput schema / properties / mappings / items / properties / target_model / anyOf
      Removed value: -[
      -  {
      -    "type": "string"
      -  },
      -  {
      -    "type": "null"
      -  }
      -]
    • addedOutput schema / properties / mappings / items / properties / target_model / type
      Added value: +[
      +  "string",
      +  "null"
      +]
    • removedOutput schema / properties / mappings / items / properties / updated_at / anyOf
      Removed value: -[
      -  {
      -    "type": "string"
      -  },
      -  {
      -    "type": "null"
      -  }
      -]
    • addedOutput schema / properties / mappings / items / properties / updated_at / type
      Added value: +[
      +  "string",
      +  "null"
      +]
    • removedOutput schema / properties / resolved_workspace / properties / name / anyOf
      Removed value: -[
      -  {
      -    "type": "string"
      -  },
      -  {
      -    "type": "null"
      -  }
      -]
    • addedOutput schema / properties / resolved_workspace / properties / name / type
      Added value: +[
      +  "string",
      +  "null"
      +]
  2. Changed2 schema fields changed
    • addedOutput schema / properties / mappings / items / properties / target_model / anyOf
      Added value: +[
      +  {
      +    "type": "string"
      +  },
      +  {
      +    "type": "null"
      +  }
      +]
    • removedOutput schema / properties / mappings / items / properties / target_model / type
      Removed value: -"string"
  3. Added

TDQS

A4.6/5.0
Behavior4/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description still adds real value: it spells out that it starts no sync and draws no mapping, explains the empty-list semantics, and flags that `truncated` marks a cut list. What it doesn't cover is ordering or what the JSONata field looks like when absent, so not quite a 5.

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?

The row-shape definition is front-loaded and the empty-list caveat earns its place. The closing paragraph largely restates the workspace_id rule already present in the schema, so there is some duplication, though no sentence is truly wasted.

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

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present, return-shape explanation isn't needed, and the description still covers the traps an agent would hit: unmapped-vs-empty, truncation, and workspace scoping. Nothing required to call it correctly is missing.

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; the description earns one more by stating where workspace_connector_id comes from and by adding the operational rule that no workspace call is needed when the token authorizes only one workspace — a nuance the schema states less directly.

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 ('List how one connected tool's data maps into Well') and then defines the row shape: one row per target_model × tool_name, carrying the JSONata expression and needs_regeneration. It is clearly distinct from well_list_connectors (the source of the id) and well_list_connector_tools.

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

Usage Guidelines5/5

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

Gives concrete triggering questions ('how does my Pennylane connection map its invoices?'), names where to get the required id, and warns that an empty list means unmapped rather than no data. It also states the single-vs-multiple-workspace routing rule explicitly, so the agent knows when a workspace call is and isn't needed first.

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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