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Huly MCP

by dearlordylord

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Invoke Tool

invoke_tool

Destructive

Invoke any Huly operation by exact name with arguments. Supports read and write actions; check tool schemas for safety.

Instructions

Invokes one proxy-visible Huly tool by exact name with its arguments. This tool can call read or write Huly operations; check get_tool_schema and the target tool annotations when safety matters.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`toolName`	Yes	Exact Huly tool name to invoke through the proxy.
`arguments`	No	Arguments object for the target Huly tool. Use {} when the target tool accepts no parameters.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes
`warnings`	No	Optional agent-visible warnings about degraded result fidelity or important operational conditions. Omitted when there is nothing the agent needs to surface.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv0.44.11Sep 22, 2026

changedOutput schema / properties / warnings / items / properties / code / enum

Previous value: -[
-  "status_metadata_unresolved",
-  "space_role_assignments_degraded",
-  "message_template_metadata_degraded",
-  "viewlet_descriptor_metadata_degraded",
-  "space_preference_metadata_degraded",
-  "approval_request_person_metadata_degraded",
-  "approval_request_count_metadata_degraded",
-  "hosted_huly_shutdown",
-  "issue_label_metadata_degraded",
-  "issue_milestone_metadata_degraded",
-  "notification_metadata_degraded",
-  "card_version_metadata_degraded",
-  "issue_creator_metadata_degraded",
-  "recruiting_review_metadata_degraded",
-  "issue_relation_metadata_degraded",
-  "class_collaborator_metadata_degraded",
-  "planner_document_metadata_degraded",
-  "external_channel_runtime_unsupported",
-  "support_runtime_unsupported",
-  "support_status_metadata_degraded",
-  "workbench_navigation_metadata_degraded",
-  "lead_customer_metadata_degraded",
-  "calendar_meeting_room_metadata_degraded",
-  "recruiting_candidate_custom_field_metadata_degraded",
-  "custom_field_metadata_degraded"
-]New value: +[
+  "status_metadata_unresolved",
+  "space_role_assignments_degraded",
+  "message_template_metadata_degraded",
+  "viewlet_descriptor_metadata_degraded",
+  "space_preference_metadata_degraded",
+  "approval_request_person_metadata_degraded",
+  "approval_request_count_metadata_degraded",
+  "hosted_huly_shutdown",
+  "issue_label_metadata_degraded",
+  "issue_milestone_metadata_degraded",
+  "notification_metadata_degraded",
+  "card_version_metadata_degraded",
+  "issue_creator_metadata_degraded",
+  "recruiting_review_metadata_degraded",
+  "issue_relation_metadata_degraded",
+  "class_collaborator_metadata_degraded",
+  "planner_document_metadata_degraded",
+  "external_channel_runtime_unsupported",
+  "support_runtime_unsupported",
+  "support_status_metadata_degraded",
+  "workbench_navigation_metadata_degraded",
+  "lead_customer_metadata_degraded",
+  "calendar_meeting_room_metadata_degraded",
+  "recruiting_candidate_custom_field_metadata_degraded",
+  "custom_field_metadata_degraded",
+  "external_publication_target_metadata_degraded"
+]

Changed1 schema field changedv0.44.9Sep 6, 2026

changedOutput schema / properties / warnings / items / properties / code / enum

Previous value: -[
-  "status_metadata_unresolved",
-  "space_role_assignments_degraded",
-  "message_template_metadata_degraded",
-  "viewlet_descriptor_metadata_degraded",
-  "space_preference_metadata_degraded",
-  "approval_request_person_metadata_degraded",
-  "approval_request_count_metadata_degraded",
-  "hosted_huly_shutdown",
-  "issue_label_metadata_degraded",
-  "issue_milestone_metadata_degraded",
-  "notification_metadata_degraded",
-  "card_version_metadata_degraded",
-  "issue_creator_metadata_degraded",
-  "recruiting_review_metadata_degraded",
-  "issue_relation_metadata_degraded",
-  "class_collaborator_metadata_degraded",
-  "external_channel_runtime_unsupported",
-  "support_runtime_unsupported",
-  "support_status_metadata_degraded",
-  "workbench_navigation_metadata_degraded"
-]New value: +[
+  "status_metadata_unresolved",
+  "space_role_assignments_degraded",
+  "message_template_metadata_degraded",
+  "viewlet_descriptor_metadata_degraded",
+  "space_preference_metadata_degraded",
+  "approval_request_person_metadata_degraded",
+  "approval_request_count_metadata_degraded",
+  "hosted_huly_shutdown",
+  "issue_label_metadata_degraded",
+  "issue_milestone_metadata_degraded",
+  "notification_metadata_degraded",
+  "card_version_metadata_degraded",
+  "issue_creator_metadata_degraded",
+  "recruiting_review_metadata_degraded",
+  "issue_relation_metadata_degraded",
+  "class_collaborator_metadata_degraded",
+  "planner_document_metadata_degraded",
+  "external_channel_runtime_unsupported",
+  "support_runtime_unsupported",
+  "support_status_metadata_degraded",
+  "workbench_navigation_metadata_degraded",
+  "lead_customer_metadata_degraded",
+  "calendar_meeting_room_metadata_degraded",
+  "recruiting_candidate_custom_field_metadata_degraded",
+  "custom_field_metadata_degraded"
+]

Changed6 schema fields changedv0.44.6Aug 13, 2026
- addedInput schema / $schema
```
Added value: +"http://json-schema.org/draft-07/schema#"
```
- removedOutput schema / properties / result / properties / result / title
```
Removed value: -"unknown"
```
- removedOutput schema / properties / result / properties / toolName / $ref
```
Removed value: -"#/$defs/ToolName"
```
- addedOutput schema / properties / result / properties / toolName / allOf
```
Added value: +[
+  {
+    "$ref": "#/$defs/ToolName"
+  }
+]
```
- addedOutput schema / properties / result / properties / toolName / description
```
Added value: +"Exact MCP tool name registered by this server."
```
- removedOutput schema / properties / result / properties / warnings / items
```
Removed value: -{
-  "title": "unknown"
-}
```

Changed1 schema field changedv0.44.5Aug 11, 2026

changedOutput schema / properties / warnings / items / properties / code / enum

Previous value: -[
-  "status_metadata_unresolved",
-  "space_role_assignments_degraded",
-  "message_template_metadata_degraded",
-  "viewlet_descriptor_metadata_degraded",
-  "space_preference_metadata_degraded",
-  "approval_request_person_metadata_degraded",
-  "approval_request_count_metadata_degraded",
-  "hosted_huly_shutdown",
-  "issue_label_metadata_degraded",
-  "issue_milestone_metadata_degraded",
-  "notification_metadata_degraded",
-  "card_version_metadata_degraded",
-  "issue_creator_metadata_degraded",
-  "recruiting_review_metadata_degraded",
-  "issue_relation_metadata_degraded",
-  "class_collaborator_metadata_degraded",
-  "external_channel_runtime_unsupported"
-]New value: +[
+  "status_metadata_unresolved",
+  "space_role_assignments_degraded",
+  "message_template_metadata_degraded",
+  "viewlet_descriptor_metadata_degraded",
+  "space_preference_metadata_degraded",
+  "approval_request_person_metadata_degraded",
+  "approval_request_count_metadata_degraded",
+  "hosted_huly_shutdown",
+  "issue_label_metadata_degraded",
+  "issue_milestone_metadata_degraded",
+  "notification_metadata_degraded",
+  "card_version_metadata_degraded",
+  "issue_creator_metadata_degraded",
+  "recruiting_review_metadata_degraded",
+  "issue_relation_metadata_degraded",
+  "class_collaborator_metadata_degraded",
+  "external_channel_runtime_unsupported",
+  "support_runtime_unsupported",
+  "support_status_metadata_degraded",
+  "workbench_navigation_metadata_degraded"
+]

Changed1 schema field changedv0.44.4Aug 2, 2026

changedOutput schema / properties / warnings / items / properties / code / enum

Previous value: -[
-  "status_metadata_unresolved",
-  "space_role_assignments_degraded",
-  "message_template_metadata_degraded",
-  "viewlet_descriptor_metadata_degraded",
-  "space_preference_metadata_degraded",
-  "approval_request_person_metadata_degraded",
-  "approval_request_count_metadata_degraded",
-  "hosted_huly_shutdown",
-  "issue_label_metadata_degraded",
-  "issue_milestone_metadata_degraded",
-  "notification_metadata_degraded",
-  "card_version_metadata_degraded",
-  "issue_creator_metadata_degraded"
-]New value: +[
+  "status_metadata_unresolved",
+  "space_role_assignments_degraded",
+  "message_template_metadata_degraded",
+  "viewlet_descriptor_metadata_degraded",
+  "space_preference_metadata_degraded",
+  "approval_request_person_metadata_degraded",
+  "approval_request_count_metadata_degraded",
+  "hosted_huly_shutdown",
+  "issue_label_metadata_degraded",
+  "issue_milestone_metadata_degraded",
+  "notification_metadata_degraded",
+  "card_version_metadata_degraded",
+  "issue_creator_metadata_degraded",
+  "recruiting_review_metadata_degraded",
+  "issue_relation_metadata_degraded",
+  "class_collaborator_metadata_degraded",
+  "external_channel_runtime_unsupported"
+]

Changed1 schema field changedv0.44.3Jul 30, 2026

changedOutput schema / properties / warnings / items / properties / code / enum

Previous value: -[
-  "status_metadata_unresolved",
-  "space_role_assignments_degraded",
-  "message_template_metadata_degraded",
-  "viewlet_descriptor_metadata_degraded",
-  "space_preference_metadata_degraded",
-  "approval_request_person_metadata_degraded",
-  "approval_request_count_metadata_degraded",
-  "hosted_huly_shutdown"
-]New value: +[
+  "status_metadata_unresolved",
+  "space_role_assignments_degraded",
+  "message_template_metadata_degraded",
+  "viewlet_descriptor_metadata_degraded",
+  "space_preference_metadata_degraded",
+  "approval_request_person_metadata_degraded",
+  "approval_request_count_metadata_degraded",
+  "hosted_huly_shutdown",
+  "issue_label_metadata_degraded",
+  "issue_milestone_metadata_degraded",
+  "notification_metadata_degraded",
+  "card_version_metadata_degraded",
+  "issue_creator_metadata_degraded"
+]

Changed2 schema fields changedv0.44.2Jul 15, 2026

changedOutput schema / properties / warnings / description

Previous value: -"Optional agent-visible warnings about degraded result fidelity. Omitted when the server returned the documented happy-path payload."New value: +"Optional agent-visible warnings about degraded result fidelity or important operational conditions. Omitted when there is nothing the agent needs to surface."

changedOutput schema / properties / warnings / items / properties / code / enum

Previous value: -[
-  "status_metadata_unresolved",
-  "space_role_assignments_degraded",
-  "message_template_metadata_degraded",
-  "viewlet_descriptor_metadata_degraded",
-  "space_preference_metadata_degraded",
-  "approval_request_person_metadata_degraded",
-  "approval_request_count_metadata_degraded"
-]New value: +[
+  "status_metadata_unresolved",
+  "space_role_assignments_degraded",
+  "message_template_metadata_degraded",
+  "viewlet_descriptor_metadata_degraded",
+  "space_preference_metadata_degraded",
+  "approval_request_person_metadata_degraded",
+  "approval_request_count_metadata_degraded",
+  "hosted_huly_shutdown"
+]

Addedv0.44.0Jun 25, 2026

TDQS

A4.2/5.0

Behavior4/5

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

Annotations already declare destructiveHint=true and readOnly=false. The description goes further by warning that it can call read or write operations and advises checking the target tool's schema and annotations. This adds actionable safety context beyond the structured fields, earning a 4.

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?

Two sentences with zero waste. The core action is front-loaded, and the safety guidance is a single clause. Every word contributes to correct usage.

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?

The tool has an output schema (true) so return values are covered. The description covers the essential dispatch mechanism and safety guidance. It does not mention behavior for unknown toolName or error cases, but given the presence of get_tool_schema as a companion, this is a minor omission. Overall adequate for a dispatcher tool.

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 100%, with toolName described as 'Exact Huly tool name' and arguments as 'Arguments object... Use {} when no parameters'. The description adds no new param-level meaning beyond what the schema provides, so the baseline 3 is appropriate.

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 the exact action ('Invokes one proxy-visible Huly tool by exact name with its arguments') with a clear verb and resource. It unambiguously differentiates from sibling tools like get_tool_schema or search_tools, which are metadata query tools, not execution tools.

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?

The description implies when to use this tool (to execute any Huly operation) and directs the agent to check get_tool_schema and annotations when safety matters. It does not explicitly state 'use this instead of X' but given the sibling set, no other tool can execute operations, so usage is clear. Missing explicit exclusions is a minor gap.

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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