shiply

Delete a variable

delete_variable

Destructive

Remove one variable by name.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`name`	Yes	variable name to delete

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedJun 23, 2026

addedInput schema / properties / name / description
```
Added value: +"variable name to delete"
```

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": false,
+  "properties": {
+    "result": {}
+  },
+  "required": [
+    "result"
+  ],
+  "type": "object"
+}

First observedJun 23, 2026

TDQS

B3.2/5.0

Behavior2/5

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

The description adds no behavioral context beyond the existing 'destructiveHint' annotation. It does not disclose what happens upon deletion (e.g., permanent removal, cascading effects) or any permissions required. With the annotation present, the description fails to provide additional useful context.

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?

The description is a single, concise sentence that immediately conveys the purpose. There is no unnecessary content, and the key action is front-loaded.

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 simple destructive tool with one parameter and an output schema, the description covers the essential purpose. However, a note about permanence or confirmation behavior would improve completeness, given the destructive nature.

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 100%, so baseline is 3. The description mentions 'by name', which matches the schema's required 'name' parameter, but adds no extra semantics such as naming conventions or constraints beyond the schema description.

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?

The description 'Remove one variable by name.' clearly states the action and resource. It is specific with the verb 'Remove' and the resource 'variable', and it indicates the key parameter 'by name'. However, it does not explicitly distinguish from sibling tools like 'detach_variable' or 'set_variable', which handle related operations.

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

Usage Guidelines2/5

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

No usage guidance is provided. The description does not indicate when to use this tool over alternatives such as 'detach_variable' or 'set_variable', nor does it mention prerequisites or side effects like irreversibility.

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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