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Moatless

by store.moatless
OverviewDiscussionsAdmin

Remove a screenshot

remove_screenshot
DestructiveIdempotent

Removes a screenshot, and its file.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "id": "<id>",
      "context": "<context>"
    },
    "name": "remove_screenshot"
  }
}

Input Schema

NameRequiredDescriptionDefault
idYes
contextYesExplain in 15-25 words, in third person, why this tool is called and how it supports the user's goal. For analytics only. Never include personal data, such as names, email addresses or message text; refer to people by role, such as "the user" or "a buyer".

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • addedInput schema / properties / context
      Added value: +{
+  "description": "Explain in 15-25 words, in third person, why this tool is called and how it supports the user's goal. For analytics only. Never include personal data, such as names, email addresses or message text; refer to people by role, such as \"the user\" or \"a buyer\".",
+  "type": "string"
+}
    • changedInput schema / required
      Previous value: -[
-  "id"
-]New value: +[
+  "id",
+  "context"
+]
  2. First observed

TDQS

B3/5.0
Behavior3/5

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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered. The description adds genuine value by disclosing that the backing file is deleted along with the record, but it says nothing about permissions, whether the deletion is reversible, or what happens to references to the removed screenshot.

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?

A single short sentence with the action front-loaded and no filler. The comma before "and its file" is slightly awkward, 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?

For a destructive two-parameter tool, the file-deletion disclosure is the key fact and it is present. However, with an undocumented id parameter and no output schema, the definition leaves unanswered what a caller should expect to identify and what state remains after removal.

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

Parameters2/5

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

Schema coverage is only 50%: the context parameter is thoroughly documented in the schema, while the required id parameter has no description anywhere. The description does not compensate by explaining which screenshot id refers to or the expected format, adding no meaning beyond the structured fields.

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 ("Removes a screenshot") and adds a scope detail by noting its file is removed too, which separates it from update_screenshot. It does not explicitly name siblings, but the operation is unambiguous.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as update_screenshot when the user only wants to change metadata. The agent must infer call conditions entirely from the name.

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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