mcp-a11y-tools
Provides AI agents with web accessibility analysis tools via MCP, enabling checks for alt text, heading hierarchy, color contrast, ARIA validation, and form accessibility.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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rog0x
Source: Glama
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
check_alt_textAnalyze images in HTML for missing, empty, or low-quality alt text. Reports which images need alt text, which use decorative (empty) alt, and which are properly labeled. Also checks linked images and input[type=image].
check_heading_hierarchyValidate heading structure in HTML: checks for proper h1-h6 nesting order, no skipped levels, single h1, empty headings, and heading content quality. Returns a visual tree of the heading structure.
check_color_contrastCheck WCAG 2.x contrast ratio between a foreground and background color pair. Reports AA and AAA compliance for both normal and large text. Accepts hex (#fff, #ffffff), rgb(r,g,b), or named colors.
validate_ariaValidate ARIA attributes in HTML: checks for invalid roles, missing required ARIA properties, redundant ARIA on native elements, aria-label on non-interactive elements, and aria-hidden on focusable elements.
check_form_accessibilityCheck form elements for accessibility: verifies labels are associated with inputs, radio/checkbox groups use fieldset/legend, placeholder is not used as sole label, autocomplete hints on personal info fields, and detects duplicate IDs.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
Tool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
5/5 tools missing one or more hints — check_alt_text (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); check_heading_hierarchy (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); check_color_contrast (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +2 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
4/5 tool handlers declare input schemas (80%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
Only 0/5 tool handlers wrap calls in try/catch (0%)
Wrap each tool handler body in try/catch and return a structured error response.
Tests exist
No test files found
Add tests that exercise each declared tool.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.12.1 (high), @modelcontextprotocol/sdk@1.12.1 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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